Jeff's Towing

Automotive service technicians and mechanics, often called service technicians or service techs, inspect, maintain, and repair cars and light trucks.  

Automotive service technicians and mechanics typically do the following:

• Test parts and systems to ensure that they are working properly
• Identify mechanical problems, often by using computerized diagnostic equipment
• Follow checklists to ensure that all critical parts are examined
• Test and lubricate the vehicle's engine and other major components
• Perform basic care and maintenance, including oil changes, tuneups, and tire rotations
• Repair or replace worn parts, such as brake pads and wheel bearings
• Disassemble and reassemble parts
• Use testing equipment to ensure that repairs and maintenance are effective
• Explain to clients their automotive problems and the repairs done on their vehicles

Service technicians work on traditional mechanical components, such as engines, transmissions, belts, and hoses. However, they must also be familiar with a growing number of electronic systems. Braking, transmission, and steering systems, for example, are controlled primarily by computers and electronic components.

Other integrated electronic systems, such as accident-avoidance sensors, are becoming common as well. In addition, a growing number of technicians are required to work on vehicles that run on alternative fuels, such as ethanol and electricity.

Service technicians use many different tools, including computerized diagnostic tools and power tools such as pneumatic wrenches, lathes, welding torches, and jacks and hoists. These tools usually are owned by their employers.

Service technicians also use many common handtools, such as pliers, wrenches, and screwdrivers, which generally are their own. In fact, experienced workers often have thousands of dollars invested in their personal tool collection.

Service technicians sometimes specialize in a particular type of repair that may be subject to specific regulations or procedures. For instance, those focused on air-conditioning system repairs must follow federal and state regulations governing the handling, recycling, and disposal of refrigerants.

In some shops, technicians may specialize. The following are types of service technicians:

Automotive air-conditioning repairers install and repair air conditioners and service parts, such as compressors, condensers, and controls. They are trained in government regulations related to their work.

Brake repairers adjust brakes, replace brake linings and pads, and make other repairs on brake systems. Some technicians specialize in both brake and front-end work. 

Front-end mechanics align and balance wheels and repair steering mechanisms and suspension systems. They frequently use special alignment equipment and wheel-balancing machines.

Transmission technicians and rebuilders work on gear trains, couplings, hydraulic pumps, and other parts of transmissions. Extensive knowledge of computer controls, the ability to diagnose electrical and hydraulic problems, and other specialized skills are needed to work on these complex components.

Tune-up technicians adjust ignition timing and valves and adjust or replace spark plugs and other parts to ensure efficient engine performance. They often use electronic testing equipment to isolate and adjust malfunctions in fuel, ignition, and emissions control systems.

For information about technicians who work on large trucks and buses, see the profile on diesel service technicians and mechanics.

For information about technicians who work on farm equipment, construction vehicles, and rail cars, see the profile on heavy vehicle and mobile equipment service technicians.

For information about technicians who repair and service motorcycles, motorboats, and small all-terrain vehicles, see the profile on small engine mechanics.

Automotive body and glass repairers restore, refinish, and replace vehicle bodies and frames, windshields, and window glass.

Automotive body and glass repairers typically do the following:

• Review damage reports, prepare cost estimates, and plan work
• Remove damaged body parts, including bumpers, fenders, hoods, grilles, and trim
• Realign car frames and chassis to repair structural damage
• Hammer out or patch dents, dimples, and other minor body damage
• Fit, attach, and weld replacement parts into place
• Install and weatherproof windows and windshields
• Grind, sand, buff, and prime refurbished and repaired surfaces
• Apply new finish to restored body parts

Automotive body and glass repairers can repair most damage from everyday vehicle collisions and make vehicles look and drive like new. Damage may be minor, such as replacing a cracked windshield, or major, such as replacing an entire door panel.

Repair technicians use many tools for their work. To remove damaged parts, such as bumpers and door panels, they use pneumatic tools, metal-cutting guns, and plasma cutters. For major structural repairs, such as aligning the body, they often use heavy-duty hydraulic jacks and hammers. For some work, they use common handtools, such as metal files, pliers, wrenches, hammers, and screwdrivers.

In some cases, repair technicians do an entire job by themselves. In other cases, especially in large shops, they use an assembly line approach in which they work as a team with each repair technician specializing.

Although repair technicians sometimes prime and paint repaired parts, automotive painters generally perform these tasks. For more information, see the profile on painting and coating workers.

The following are occupational specialties: 

Automotive body and related repairers, or collision repair technicians, straighten metal panels, remove dents, and replace parts that cannot be fixed. Although they repair all types of vehicles, most work primarily on cars, sport utility vehicles, and small trucks. 

Automotive glass installers and repairers remove and replace broken, cracked, or pitted windshields and window glass. They also weatherproof newly installed windows and windshields with chemical treatments.

Auctioneers sell articles or farm products at auction to highest bidder. Appraise merchandise before sale and assemble merchandise in lots according to estimated value of individual items. Select articles to be auctioned at suggestion of bidders or by own choice. Appraise items, provide background information, ask for starting price, continue to ask for bids, and close sale to highest bidder.

Automotive service technicians and mechanics, often called service technicians or service techs, inspect, maintain, and repair cars and light trucks.  

Automotive service technicians and mechanics typically do the following:

• Test parts and systems to ensure that they are working properly
• Identify mechanical problems, often by using computerized diagnostic equipment
• Follow checklists to ensure that all critical parts are examined
• Test and lubricate the vehicle's engine and other major components
• Perform basic care and maintenance, including oil changes, tuneups, and tire rotations
• Repair or replace worn parts, such as brake pads and wheel bearings
• Disassemble and reassemble parts
• Use testing equipment to ensure that repairs and maintenance are effective
• Explain to clients their automotive problems and the repairs done on their vehicles

Service technicians work on traditional mechanical components, such as engines, transmissions, belts, and hoses. However, they must also be familiar with a growing number of electronic systems. Braking, transmission, and steering systems, for example, are controlled primarily by computers and electronic components.

Other integrated electronic systems, such as accident-avoidance sensors, are becoming common as well. In addition, a growing number of technicians are required to work on vehicles that run on alternative fuels, such as ethanol and electricity.

Service technicians use many different tools, including computerized diagnostic tools and power tools such as pneumatic wrenches, lathes, welding torches, and jacks and hoists. These tools usually are owned by their employers.

Service technicians also use many common handtools, such as pliers, wrenches, and screwdrivers, which generally are their own. In fact, experienced workers often have thousands of dollars invested in their personal tool collection.

Service technicians sometimes specialize in a particular type of repair that may be subject to specific regulations or procedures. For instance, those focused on air-conditioning system repairs must follow federal and state regulations governing the handling, recycling, and disposal of refrigerants.

In some shops, technicians may specialize. The following are types of service technicians:

Automotive air-conditioning repairers install and repair air conditioners and service parts, such as compressors, condensers, and controls. They are trained in government regulations related to their work.

Brake repairers adjust brakes, replace brake linings and pads, and make other repairs on brake systems. Some technicians specialize in both brake and front-end work. 

Front-end mechanics align and balance wheels and repair steering mechanisms and suspension systems. They frequently use special alignment equipment and wheel-balancing machines.

Transmission technicians and rebuilders work on gear trains, couplings, hydraulic pumps, and other parts of transmissions. Extensive knowledge of computer controls, the ability to diagnose electrical and hydraulic problems, and other specialized skills are needed to work on these complex components.

Tune-up technicians adjust ignition timing and valves and adjust or replace spark plugs and other parts to ensure efficient engine performance. They often use electronic testing equipment to isolate and adjust malfunctions in fuel, ignition, and emissions control systems.

For information about technicians who work on large trucks and buses, see the profile on diesel service technicians and mechanics.

For information about technicians who work on farm equipment, construction vehicles, and rail cars, see the profile on heavy vehicle and mobile equipment service technicians.

For information about technicians who repair and service motorcycles, motorboats, and small all-terrain vehicles, see the profile on small engine mechanics.

Heavy vehicle and mobile equipment service technicians inspect, maintain, and repair vehicles and machinery used in construction, farming, rail transportation, and other industries.

Heavy vehicle and mobile equipment service technicians typically do the following:

• Read and understand operating manuals, blueprints, and drawings
• Perform scheduled maintenance, such as cleaning and lubricating parts
• Diagnose and identify malfunctions, using computerized tools and equipment
• Inspect, repair, and replace defective or worn parts, such as bearings, pistons, and gears
• Overhaul and test major components, such as engines, hydraulics, and electrical systems
• Disassemble and reassemble heavy equipment and components
• Travel to worksites to repair large equipment, such as cranes

Heavy vehicles and mobile equipment are critical to many industrial activities, including construction and railroad transportation. Various types of equipment, such as farm machinery, cranes, and bulldozers, are used to move materials, till land, lift beams, and dig earth to pave the way for development and construction.

Heavy vehicle and mobile equipment service technicians repair and maintain engines, hydraulic systems, transmissions, and electrical systems of agricultural, industrial, construction, and rail equipment. They ensure the performance and safety of fuel lines, brakes, transmissions, and other systems.

With many types of equipment and mechanical and electrical systems, service technicians use diagnostic computers to identify problems and make adjustments or repairs. Although the use of computerized testing equipment, such as tachometers and dynamometers, is common, technicians also use many different power and machine tools, including pneumatic wrenches, lathes, and welding equipment.

Service technicians also use many different handtools, such as screwdrivers, pliers, and wrenches, to work on small parts and in hard-to-reach areas. They generally purchase these tools over the course of their careers, often investing thousands of dollars in their collections.

After locating malfunctions, service technicians repair, replace, and recalibrate components such as hydraulic pumps or spark plugs. This may involve disassembling and reassembling major equipment or making adjustments through an onboard computer program.

The following are types of heavy vehicle and mobile equipment service technicians:

Farm equipment mechanics service and repair farm equipment, such as tractors and harvesters. They also work on smaller consumer-grade lawn and garden tractors. Most mechanics work for dealer repair shops, where farmers increasingly send their equipment for maintenance.   

Mobile heavy equipment mechanics repair and maintain construction and surface mining equipment, such as bulldozers, cranes, graders, and excavators. Many work for equipment wholesale and distribution shops and large construction and mining companies. Those working for the federal government may work on tanks and other military equipment.

Rail car repairers specialize in servicing railroad locomotives, subway cars, and other rolling stock. They usually work for railroad, public and private transit companies, and rail car manufacturers.

For information about technicians and mechanics who work primarily on automobiles, see the profile on automotive service technicians and mechanics.

For information about technicians who work primarily on large trucks and buses, see the profile on diesel service technicians and mechanics.

For information about technicians and mechanics who primarily work on motorboats, motorcycles and small all-terrain vehicles, see the profile on small engine mechanics.

Automotive body and glass repairers restore, refinish, and replace vehicle bodies and frames, windshields, and window glass.

Automotive body and glass repairers typically do the following:

• Review damage reports, prepare cost estimates, and plan work
• Remove damaged body parts, including bumpers, fenders, hoods, grilles, and trim
• Realign car frames and chassis to repair structural damage
• Hammer out or patch dents, dimples, and other minor body damage
• Fit, attach, and weld replacement parts into place
• Install and weatherproof windows and windshields
• Grind, sand, buff, and prime refurbished and repaired surfaces
• Apply new finish to restored body parts

Automotive body and glass repairers can repair most damage from everyday vehicle collisions and make vehicles look and drive like new. Damage may be minor, such as replacing a cracked windshield, or major, such as replacing an entire door panel.

Repair technicians use many tools for their work. To remove damaged parts, such as bumpers and door panels, they use pneumatic tools, metal-cutting guns, and plasma cutters. For major structural repairs, such as aligning the body, they often use heavy-duty hydraulic jacks and hammers. For some work, they use common handtools, such as metal files, pliers, wrenches, hammers, and screwdrivers.

In some cases, repair technicians do an entire job by themselves. In other cases, especially in large shops, they use an assembly line approach in which they work as a team with each repair technician specializing.

Although repair technicians sometimes prime and paint repaired parts, automotive painters generally perform these tasks. For more information, see the profile on painting and coating workers.

The following are occupational specialties: 

Automotive body and related repairers, or collision repair technicians, straighten metal panels, remove dents, and replace parts that cannot be fixed. Although they repair all types of vehicles, most work primarily on cars, sport utility vehicles, and small trucks. 

Automotive glass installers and repairers remove and replace broken, cracked, or pitted windshields and window glass. They also weatherproof newly installed windows and windshields with chemical treatments.

Transportation, Storage, and Distribution Managers plan, direct, or coordinate transportation, storage, or distribution activities in accordance with organizational policies and applicable government laws or regulations. Includes logistics managers.

Heavy vehicle and mobile equipment service technicians inspect, maintain, and repair vehicles and machinery used in construction, farming, rail transportation, and other industries.

Heavy vehicle and mobile equipment service technicians typically do the following:

• Read and understand operating manuals, blueprints, and drawings
• Perform scheduled maintenance, such as cleaning and lubricating parts
• Diagnose and identify malfunctions, using computerized tools and equipment
• Inspect, repair, and replace defective or worn parts, such as bearings, pistons, and gears
• Overhaul and test major components, such as engines, hydraulics, and electrical systems
• Disassemble and reassemble heavy equipment and components
• Travel to worksites to repair large equipment, such as cranes

Heavy vehicles and mobile equipment are critical to many industrial activities, including construction and railroad transportation. Various types of equipment, such as farm machinery, cranes, and bulldozers, are used to move materials, till land, lift beams, and dig earth to pave the way for development and construction.

Heavy vehicle and mobile equipment service technicians repair and maintain engines, hydraulic systems, transmissions, and electrical systems of agricultural, industrial, construction, and rail equipment. They ensure the performance and safety of fuel lines, brakes, transmissions, and other systems.

With many types of equipment and mechanical and electrical systems, service technicians use diagnostic computers to identify problems and make adjustments or repairs. Although the use of computerized testing equipment, such as tachometers and dynamometers, is common, technicians also use many different power and machine tools, including pneumatic wrenches, lathes, and welding equipment.

Service technicians also use many different handtools, such as screwdrivers, pliers, and wrenches, to work on small parts and in hard-to-reach areas. They generally purchase these tools over the course of their careers, often investing thousands of dollars in their collections.

After locating malfunctions, service technicians repair, replace, and recalibrate components such as hydraulic pumps or spark plugs. This may involve disassembling and reassembling major equipment or making adjustments through an onboard computer program.

The following are types of heavy vehicle and mobile equipment service technicians:

Farm equipment mechanics service and repair farm equipment, such as tractors and harvesters. They also work on smaller consumer-grade lawn and garden tractors. Most mechanics work for dealer repair shops, where farmers increasingly send their equipment for maintenance.   

Mobile heavy equipment mechanics repair and maintain construction and surface mining equipment, such as bulldozers, cranes, graders, and excavators. Many work for equipment wholesale and distribution shops and large construction and mining companies. Those working for the federal government may work on tanks and other military equipment.

Rail car repairers specialize in servicing railroad locomotives, subway cars, and other rolling stock. They usually work for railroad, public and private transit companies, and rail car manufacturers.

For information about technicians and mechanics who work primarily on automobiles, see the profile on automotive service technicians and mechanics.

For information about technicians who work primarily on large trucks and buses, see the profile on diesel service technicians and mechanics.

For information about technicians and mechanics who primarily work on motorboats, motorcycles and small all-terrain vehicles, see the profile on small engine mechanics.

Material moving machine operators use machinery to transport various objects. Some operators move construction materials around building sites or earth around a mine. Others move goods around a warehouse or onto and off of container ships.

Material moving machine operators typically do the following:

• Control equipment with levers, wheels, or foot pedals
• Move material according to a plan or schedule they receive from their superiors
• Set up and inspect material moving equipment
• Make minor repairs to their equipment
• Record the material they have moved and where they moved it from and to

In warehouse environments, most material moving machine operators use forklifts and conveyor belts. Automated sensors and tags are increasingly used to keep track of merchandise, allowing operators to work faster.

In warehouses, operators usually work closely with hand material movers. For more information, see the profile on hand laborers and material movers.

Many operators work for underground and surface mining companies. They help to dig or expose the mine, remove the earth and rock, and extract the ore and other mined materials.

In construction, material movers remove earth to clear space for buildings. Some work on a building site for the entire length of the construction project. For example, material moving machine operators often help to construct high-rise buildings by transporting materials to workers far above ground level.

The following are types of material moving machine operators:

Industrial truck and tractor operators drive trucks and tractors that move materials around warehouses, storage yards, or worksites. These trucks, often called forklifts, have a lifting mechanism and forks, which makes them useful for moving heavy and large objects. Some industrial truck and tractor operators drive tractors that pull trailers loaded with material around factories or storage areas.

Excavating and loading machine and dragline operators use machines equipped with scoops or shovels. They dig sand, earth, or other materials and load them onto conveyors for transport elsewhere. Most of these operators work in construction or mining industries.

Dredge operators excavate waterways. They remove sand, gravel, or rock from harbors or lakes to help prevent erosion and improve trade. Removing these materials helps maintain navigable waterways and allows larger ships to use more ports. Dredging is also used to help restore wetlands and maintain beaches.

Underground mining loading machine operators load coal, ore, and other rocks onto shuttles, mine cars, or conveyors for transport from a mine to the surface. These workers generally work underground in mines. They may use power shovels, hoisting engines equipped with scrapers or scoops, and automatic gathering arms that move materials onto a conveyor.

Crane and tower operators use tower and cable equipment to lift and move materials, machinery, or other heavy objects. Operators extend and retract horizontal arms and lower and raise hooks attached to cables at the end of their crane or tower. Operators are usually guided by other workers on the ground using hand signals or a radio. Most crane and tower operators work at construction sites or major ports, where they load and unload cargo. Some also work in iron and steel mills. 

Hoist and winch operators, also called derrick operators or hydraulic boom operators, control the movement of platforms, cables, and cages that transport workers or materials for industrial operations, such as constructing a high-rise building. Many of these operators raise platforms up far above the ground. Most work in manufacturing or construction industries. For more information about rig derrick equipment workers, see the profile on oil and gas workers.

Conveyor operators and tenders control conveyor systems that move materials on an automatic belt. They move materials to and from places such as building sites, storage areas, and vehicles.

Heavy vehicle and mobile equipment service technicians inspect, maintain, and repair vehicles and machinery used in construction, farming, rail transportation, and other industries.

Heavy vehicle and mobile equipment service technicians typically do the following:

• Read and understand operating manuals, blueprints, and drawings
• Perform scheduled maintenance, such as cleaning and lubricating parts
• Diagnose and identify malfunctions, using computerized tools and equipment
• Inspect, repair, and replace defective or worn parts, such as bearings, pistons, and gears
• Overhaul and test major components, such as engines, hydraulics, and electrical systems
• Disassemble and reassemble heavy equipment and components
• Travel to worksites to repair large equipment, such as cranes

Heavy vehicles and mobile equipment are critical to many industrial activities, including construction and railroad transportation. Various types of equipment, such as farm machinery, cranes, and bulldozers, are used to move materials, till land, lift beams, and dig earth to pave the way for development and construction.

Heavy vehicle and mobile equipment service technicians repair and maintain engines, hydraulic systems, transmissions, and electrical systems of agricultural, industrial, construction, and rail equipment. They ensure the performance and safety of fuel lines, brakes, transmissions, and other systems.

With many types of equipment and mechanical and electrical systems, service technicians use diagnostic computers to identify problems and make adjustments or repairs. Although the use of computerized testing equipment, such as tachometers and dynamometers, is common, technicians also use many different power and machine tools, including pneumatic wrenches, lathes, and welding equipment.

Service technicians also use many different handtools, such as screwdrivers, pliers, and wrenches, to work on small parts and in hard-to-reach areas. They generally purchase these tools over the course of their careers, often investing thousands of dollars in their collections.

After locating malfunctions, service technicians repair, replace, and recalibrate components such as hydraulic pumps or spark plugs. This may involve disassembling and reassembling major equipment or making adjustments through an onboard computer program.

The following are types of heavy vehicle and mobile equipment service technicians:

Farm equipment mechanics service and repair farm equipment, such as tractors and harvesters. They also work on smaller consumer-grade lawn and garden tractors. Most mechanics work for dealer repair shops, where farmers increasingly send their equipment for maintenance.   

Mobile heavy equipment mechanics repair and maintain construction and surface mining equipment, such as bulldozers, cranes, graders, and excavators. Many work for equipment wholesale and distribution shops and large construction and mining companies. Those working for the federal government may work on tanks and other military equipment.

Rail car repairers specialize in servicing railroad locomotives, subway cars, and other rolling stock. They usually work for railroad, public and private transit companies, and rail car manufacturers.

For information about technicians and mechanics who work primarily on automobiles, see the profile on automotive service technicians and mechanics.

For information about technicians who work primarily on large trucks and buses, see the profile on diesel service technicians and mechanics.

For information about technicians and mechanics who primarily work on motorboats, motorcycles and small all-terrain vehicles, see the profile on small engine mechanics.

Police officers protect lives and property. Detectives and criminal investigators, who sometimes are called agents or special agents, gather facts and collect evidence of possible crimes. Law enforcement officers' duties depend on the size and type of their organizations.

Uniformed police officers typically do the following:

• Enforce laws
• Respond to calls for service
• Patrol assigned areas
• Conduct traffic stops and issue citations
• Arrest suspects
• Write detailed reports and fill out forms
• Prepare cases and testify in court

Detectives and criminal investigators typically do the following:

• Investigate crimes
• Collect evidence of crimes
• Conduct interviews with suspects and witnesses
• Observe the activities of suspects
• Arrest suspects
• Write detailed reports and fill out forms
• Prepare cases and testify in court

Police officers pursue and apprehend people who break the law and then warn them, cite them, or arrest them. Most police officers patrol their jurisdictions and investigate any suspicious activity they notice. They also respond to calls, issue traffic tickets, investigate domestic issues, and give first aid to accident victims.

Detectives perform investigative duties such as gathering facts and collecting evidence.

The daily activities of police and detectives vary with their occupational specialty and whether they are working for a local, state, or federal agency. Duties also differ among federal agencies, which enforce different aspects of the law. Regardless of job duties or location, police officers and detectives at all levels must write reports and keep detailed records that will be needed if they testify in court.

The following are examples of types of police and detectives who work in state and local law enforcement and in federal law enforcement:

State and Local Law Enforcement

Uniformed police officers have general law enforcement duties. They wear uniforms that allow the public to easily recognize them as police officers. They have regular patrols and also respond to calls for service.

Police agencies are usually organized into geographic districts, with uniformed officers assigned to patrol a specific area. Officers in large agencies often patrol with a partner. During patrols, officers look for any signs of criminal activity and may conduct searches or arrest suspected criminals. They may also respond to emergency calls, investigate complaints, and enforce traffic laws.

Some police officers work only on a specific type of crime, such as narcotics. Officers, especially those working in large departments, may also work in special units, such as horseback, motorcycle, and canine corps or special weapons and tactics (SWAT) teams. Typically, officers must work as patrol officers for a certain number of years before they may be appointed to one of these units.

Many city police agencies are involved in community policing, a philosophy of bringing police and members of the community together to prevent crime. A neighborhood watch program is one type of community policing.

Some agencies have special geographic and enforcement responsibilities. Examples include public college and university police forces, public school district police, and transit police. Most law enforcement workers in special agencies are uniformed officers.

State police officers, sometimes called state troopers or highway patrol officers, have many of the same duties as other police officers, but they may spend more time enforcing traffic laws and issuing traffic citations. State police officers have authority to work anywhere in the state and are frequently called on to help other law enforcement agencies, especially those in rural areas or small towns. State highway patrols operate in every state except Hawaii.

Transit and railroad police patrol railroad yards and transit stations. They protect property, employees, and passengers from crimes such as thefts and robberies. They remove trespassers from railroad and transit properties and check the IDs of people who try to enter secure areas.   

Sheriffs and deputy sheriffs enforce the law on the county level. Sheriffs' departments tend to be relatively small. Sheriffs usually are elected by the public and do the same work as a local or county police chief. Some sheriffs' departments do the same work as officers in urban police departments. Others mainly operate the county jails and provide services in the local courts. Police and sheriffs' deputies who provide security in city and county courts are sometimes called bailiffs.

Detectives and criminal investigators are plainclothes investigators who gather facts and collect evidence for criminal cases. They conduct interviews, examine records, observe the activities of suspects, and participate in raids or arrests. Detectives usually specialize in investigating one type of crime, such as homicide or fraud. Detectives are typically assigned cases on a rotating basis and work on them until an arrest and conviction is made or until the case is dropped.

Fish and game wardens enforce fishing, hunting, and boating laws. They patrol hunting and fishing areas, conduct search and rescue operations, investigate complaints and accidents, and educate the public about laws pertaining to their environment.

Federal Law Enforcement

Federal law enforcement officials carry out many of the same duties that other police officers do; however, they have jurisdiction over the entire country. Many federal agents are highly specialized. The following are examples of federal agencies in which officers and agents enforce particular types of laws.

• Federal Bureau of Investigation (FBI) agents are the federal government's principal investigators, responsible for enforcing more than 300 federal statutes and conducting sensitive national security investigations.
• U.S. Drug Enforcement Administration (DEA) agents enforce laws and regulations relating to illegal drugs.
• U.S. Secret Service uniformed officers protect the President, the Vice President, their immediate families, and other public officials.
• Federal Air Marshals provide air security by guarding against attacks targeting U.S. aircraft, passengers, and crews.
• U.S. Border patrol agents protect international land and water boundaries.

See the Contacts for More Information section for more information about federal law enforcement agencies.

Automotive service technicians and mechanics, often called service technicians or service techs, inspect, maintain, and repair cars and light trucks.  

Automotive service technicians and mechanics typically do the following:

• Test parts and systems to ensure that they are working properly
• Identify mechanical problems, often by using computerized diagnostic equipment
• Follow checklists to ensure that all critical parts are examined
• Test and lubricate the vehicle's engine and other major components
• Perform basic care and maintenance, including oil changes, tuneups, and tire rotations
• Repair or replace worn parts, such as brake pads and wheel bearings
• Disassemble and reassemble parts
• Use testing equipment to ensure that repairs and maintenance are effective
• Explain to clients their automotive problems and the repairs done on their vehicles

Service technicians work on traditional mechanical components, such as engines, transmissions, belts, and hoses. However, they must also be familiar with a growing number of electronic systems. Braking, transmission, and steering systems, for example, are controlled primarily by computers and electronic components.

Other integrated electronic systems, such as accident-avoidance sensors, are becoming common as well. In addition, a growing number of technicians are required to work on vehicles that run on alternative fuels, such as ethanol and electricity.

Service technicians use many different tools, including computerized diagnostic tools and power tools such as pneumatic wrenches, lathes, welding torches, and jacks and hoists. These tools usually are owned by their employers.

Service technicians also use many common handtools, such as pliers, wrenches, and screwdrivers, which generally are their own. In fact, experienced workers often have thousands of dollars invested in their personal tool collection.

Service technicians sometimes specialize in a particular type of repair that may be subject to specific regulations or procedures. For instance, those focused on air-conditioning system repairs must follow federal and state regulations governing the handling, recycling, and disposal of refrigerants.

In some shops, technicians may specialize. The following are types of service technicians:

Automotive air-conditioning repairers install and repair air conditioners and service parts, such as compressors, condensers, and controls. They are trained in government regulations related to their work.

Brake repairers adjust brakes, replace brake linings and pads, and make other repairs on brake systems. Some technicians specialize in both brake and front-end work. 

Front-end mechanics align and balance wheels and repair steering mechanisms and suspension systems. They frequently use special alignment equipment and wheel-balancing machines.

Transmission technicians and rebuilders work on gear trains, couplings, hydraulic pumps, and other parts of transmissions. Extensive knowledge of computer controls, the ability to diagnose electrical and hydraulic problems, and other specialized skills are needed to work on these complex components.

Tune-up technicians adjust ignition timing and valves and adjust or replace spark plugs and other parts to ensure efficient engine performance. They often use electronic testing equipment to isolate and adjust malfunctions in fuel, ignition, and emissions control systems.

For information about technicians who work on large trucks and buses, see the profile on diesel service technicians and mechanics.

For information about technicians who work on farm equipment, construction vehicles, and rail cars, see the profile on heavy vehicle and mobile equipment service technicians.

For information about technicians who repair and service motorcycles, motorboats, and small all-terrain vehicles, see the profile on small engine mechanics.

Hand laborers and material movers transport objects without using machines. Some workers move freight, stock, or other materials around storage facilities; others clean vehicles; some pick up unwanted household goods; and still others pack materials for moving.

Hand laborers and material movers typically do the following:

• Manually move material from one place to another
• Pack or wrap material by hand
• Keep a record of the material they move
• Use signals to assist machine operators who are moving larger pieces of material, when necessary

In warehouses and wholesale and retail operations, hand material movers work closely with material-moving machine operators and material recording clerks. Automatic sensors and tags are increasingly being used to track items that allow these employees to work faster. Some workers are employed in manufacturing industries in which they load material onto conveyor belts or other machines.

The following are some examples of hand laborers and material movers:

Laborers and hand freight, stock, and material movers move materials to and from storage and production areas, loading docks, delivery trucks, ships, and containers. Most of these movers work in warehouses, although their specific duties vary. Some workers, called pickers, find products in storage and transport them to the loading area. Other workers load and unload cargo from a truck. Sometimes they open containers and sort the material.

Hand packers and packagers package a variety of materials by hand. They may label cartons, inspect items for defects, and record items packed. Some of these workers pack materials for shipment and transport them to a loading dock. Others work in retail as gift wrappers. Many hand packers are employed by grocery stores, where they bag groceries for customers at checkout.

Machine feeders and offbearers process materials by feeding them into equipment or by removing materials from equipment. This equipment is generally operated by other workers, such as material-moving machine operators. Machine feeders and offbearers might help the operator if the machine becomes jammed or needs minor repairs. Machine feeders track the amount of material they process during a shift.

Cleaners of vehicles and equipment clean automobiles and other vehicles, as well as storage tanks, pipelines, and related machinery. They use cleaning products, vacuums, hoses, and brushes. Most of these workers clean cars at a carwash, automobile dealership, or rental agency. Some clean industrial equipment at manufacturing firms.

Refuse and recyclable material collectors gather garbage and recyclables from homes and businesses to transport to a dump, landfill, or recycling center. Many collectors lift garbage cans by hand and empty them into their truck. Some collectors drive the garbage or recycling truck along a scheduled route. When collecting materials from a dumpster, drivers use a hydraulic lift to empty contents of the dumpster into their truck.

Hand laborers and material movers transport objects without using machines. Some workers move freight, stock, or other materials around storage facilities; others clean vehicles; some pick up unwanted household goods; and still others pack materials for moving.

Hand laborers and material movers typically do the following:

• Manually move material from one place to another
• Pack or wrap material by hand
• Keep a record of the material they move
• Use signals to assist machine operators who are moving larger pieces of material, when necessary

In warehouses and wholesale and retail operations, hand material movers work closely with material-moving machine operators and material recording clerks. Automatic sensors and tags are increasingly being used to track items that allow these employees to work faster. Some workers are employed in manufacturing industries in which they load material onto conveyor belts or other machines.

The following are some examples of hand laborers and material movers:

Laborers and hand freight, stock, and material movers move materials to and from storage and production areas, loading docks, delivery trucks, ships, and containers. Most of these movers work in warehouses, although their specific duties vary. Some workers, called pickers, find products in storage and transport them to the loading area. Other workers load and unload cargo from a truck. Sometimes they open containers and sort the material.

Hand packers and packagers package a variety of materials by hand. They may label cartons, inspect items for defects, and record items packed. Some of these workers pack materials for shipment and transport them to a loading dock. Others work in retail as gift wrappers. Many hand packers are employed by grocery stores, where they bag groceries for customers at checkout.

Machine feeders and offbearers process materials by feeding them into equipment or by removing materials from equipment. This equipment is generally operated by other workers, such as material-moving machine operators. Machine feeders and offbearers might help the operator if the machine becomes jammed or needs minor repairs. Machine feeders track the amount of material they process during a shift.

Cleaners of vehicles and equipment clean automobiles and other vehicles, as well as storage tanks, pipelines, and related machinery. They use cleaning products, vacuums, hoses, and brushes. Most of these workers clean cars at a carwash, automobile dealership, or rental agency. Some clean industrial equipment at manufacturing firms.

Refuse and recyclable material collectors gather garbage and recyclables from homes and businesses to transport to a dump, landfill, or recycling center. Many collectors lift garbage cans by hand and empty them into their truck. Some collectors drive the garbage or recycling truck along a scheduled route. When collecting materials from a dumpster, drivers use a hydraulic lift to empty contents of the dumpster into their truck.