Forensic science technicians help investigate crimes by collecting and analyzing physical evidence. Most technicians specialize in either crime scene investigation or laboratory analysis.
At crime scenes, forensic science technicians, also known as crime scene investigators, typically do the following:
Crime scene investigators may use tweezers, black lights, and specialized kits to identify and collect evidence. In addition to processing crime scenes, they may also attend autopsies.
In laboratories, forensic science technicians typically do the following:
Forensic science technicians reconstruct crime scenes by carefully studying information gathered by investigators and conducting scientific tests on physical evidence. For example, lab technicians may look at photographs of blood splatter patterns and conduct ballistics tests on bullets found at the crime scene to determine the direction from which a shot was fired.
Forensic science technicians who work in laboratories use chemicals and laboratory equipment such as microscopes when analyzing evidence. They also use computer databases to examine fingerprints, DNA, and other evidence collected at crime scenes in order to match them to people and things that have already been identified. Most forensic science technicians who perform laboratory analysis specialize in a specific type of evidence analysis, such as DNA or ballistics.
All forensic science technicians prepare written reports that detail their findings and investigative methods. They must be able to explain their reports to lawyers, detectives, and other law enforcement officials. In addition, forensic science technicians may be called to testify in court about their findings and methods.
Architects plan and design buildings and other structures.
Architects typically do the following:
People need places to live, work, play, learn, worship, meet, govern, shop, and eat. Architects are responsible for designing these places, whether they are private or public; indoors or outdoors; or rooms, buildings, or complexes.
Architects discuss with clients the objectives, requirements, and budget of a project. In some cases, architects provide various predesign services, such as feasibility and environmental impact studies, site selection, cost analyses and land-use studies, and design requirements. For example, architects may determine a building's space requirements by researching its number and types of potential users.
After discussing and agreeing on the initial proposal, architects develop final construction plans that show the building's appearance and details for its construction. Accompanying these plans are drawings of the structural system; air-conditioning, heating, and ventilating systems; electrical systems; communications systems; plumbing; and, possibly, site and landscape plans.
In developing designs, architects must follow building codes, zoning laws, fire regulations, and other ordinances, such as those requiring easy access by people who are disabled.
Computer-aided design and drafting (CADD) and building information modeling (BIM) technology have replaced traditional drafting paper and pencil as the most common methods for creating designs and construction drawings.
Architects also may help clients get construction bids, select contractors, and negotiate construction contracts.
As construction proceeds, architects may visit building sites to ensure that contractors follow the design, keep to the schedule, use the specified materials, and meet work-quality standards. The job is not complete until all construction is finished, required tests are conducted, and construction costs are paid.
Architects often work with workers in related professions. For more information on these occupations, see the profiles on civil engineers, urban and regional planners, interior designers, and landscape architects.
Drafters use software to convert the designs of engineers and architects into technical drawings and plans. Workers in production and construction use these plans to build everything from microchips to skyscrapers.
Drafters typically do the following:
Many drafters are referred to as CADD operators. With CADD systems, drafters create and store drawings electronically so that they can be viewed, printed, or programmed directly into automated manufacturing systems. New software systems, such as building information modeling (BIM) and product data management (PDM), are coming into use. Through three-dimensional rendering, BIM software allows designers and engineers to see how elements in their projects work together. PDM software helps users track and control data, such as technical specifications, related to projects. Just as BIM is changing the work of architectural drafters as well as engineers and designers, PDM is changing the work of mechanical drafters. These software systems allow drafting and design work to be done at the same time as the work done by other professionals involved in the project.
There are several kinds of drafters, and the most common types of drafters are the following:
Aeronautical drafters prepare engineering drawings that show detailed plans and specifications used in manufacturing aircraft, missiles, and related parts.
Architectural drafters draw architectural and structural features of buildings for new construction projects. These workers may specialize in a type of building, such as residential or commercial. They may also specialize in materials, such as steel, wood, and reinforced concrete.
Civil drafters prepare topographical maps used in major construction or civil engineering projects, such as highways, bridges, and flood-control projects.
Electrical drafters prepare wiring diagrams that other workers use to install and repair electrical equipment and wiring in powerplants, electrical distribution systems, and buildings.
Electronics drafters produce wiring diagrams, assembly diagrams for circuit boards, and layout drawings used in manufacturing, installing, and repairing electronic devices and components.
Mechanical drafters prepare layouts that show details for a wide variety of machinery and mechanical devices. These layouts indicate dimensions, fastening methods, and other requirements needed for assembly.
Process piping or pipeline drafters prepare plans used in the layout, construction, and operation of oil and gas fields, refineries, chemical plants, and process piping systems.
Civil engineers design and supervise large construction projects, including roads, buildings, airports, tunnels, dams, bridges, and systems for water supply and sewage treatment.
Civil engineers typically do the following:
Many civil engineers hold supervisory or administrative positions ranging from supervisor of a construction site to city engineer. Others work in design, construction, research, and teaching. They work with others on projects and may be assisted by civil engineering technicians and technologists.
The federal government employs about 12,100 civil engineers to do many of the same things done in private industry, except that the federally employed civil engineers may also inspect projects to be sure that they comply with regulations.
Civil engineers work on complex projects, so they usually specialize in one of several areas.
Geotechnical engineers work to make sure that foundations are solid. They focus on how structures built by civil engineers, such as buildings and tunnels, interact with the earth (including soil and rock). Additionally, they design and plan for slopes, retaining walls, and tunnels.
Structural engineers design and assess major projects, such as bridges or dams, to ensure their strength and durability.
Transportation engineers plan and design everyday systems, such as streets and highways, but they also plan larger projects, such as airports, ports, and harbors.
Mechanical engineering is one of the broadest engineering disciplines. Mechanical engineers research, design, develop, build, and test mechanical devices, including tools, engines, and machines.
Mechanical engineers typically do the following:
Mechanical engineers use many types of tools, engines, and machines. Examples include the following:
Like other engineers, mechanical engineers use computers extensively. Computers help mechanical engineers to do the following: