Statisticians are mathematicians who specialize in the collection, organization and interpretation of numerical data.
Economists analyze the production, distribution and consumption of commodities and help determine the proper management of resources, as of income, materials or labor.
Actuaries are statisticians who compute insurance risks and premiums.
Operations-Research Analysts are problem-solvers who study and analyze and evaluate business problems and create mathematical models to aid in redesigning an organization's systems.
Financial Analysts specialize in studying transactions involving money and the management of monetary resources, funds and other assets.
Hydrologists are geophysicists who study the physical properties of the movement and distribution of water.
Hydrographic Surveyors examine and analyze the physical conditions, boundaries, flow and related characteristics of oceans, lakes, rivers and other surface waters.
Hydraulic Engineers study the science and technology of the static and dynamic behavior of fluids, and design equipment involved, moved or operated by a fluid, especially water, under pressure.
Civil Engineers design the machinery, wells and pumps, used to extract water from beneath the earth's surface.
Hydro-geologists test the water for consumption and study the effects of water on the earth's surface, in the soil and underlying rocks.
Reclamation Specialists study the beneficial use of treated wastewater for such planned uses as irrigation, industrial cooling, recreation, groundwater recharge and environmental enhancement.
Treatment Plant Operators are responsible for the equipment used for the collection, treatment and disposal of wastewater that is sometimes released for beneficial reuse.
Systems Engineers are responsible for the overall design of a spacecraft or space habitat.
Energy Systems Engineers design and build power systems for spacecraft, such as solar panels for a space station.
Telecommunications Engineers design, build and maintain systems for communication between spacecraft and earth.
Propulsion Engineers design, build and maintain the thrusters or rocket engines that move spacecraft through space.
Computer Engineers design, build and program the computers used for space flight and living in space.
Orbital Mechanics Engineers are the navigators of a spaceship.
Space Geologists study the composition of soils and minerals on planets and asteroids.
Mission Control Specialists monitor every aspect of a space flight, including the health of the crew.
Biosystems Engineers study life systems, such as in space habitats, which must be self-contained and in which everything is recycled
Industrial Designers conceive of new or improved designs for cars, boats and trains and equipment such as airbags, seat belts, and reclining airplane seats.
Aerospace Engineers design, test and supervise the assembly of aircraft and spacecraft.
Automotive Engineers design and develop new cars.
Marine Engineers work with naval architects to design and build machinery for marine vessels.
City and Regional Planners plan roads, train routes, subway systems, etc., while Civil Engineers design and supervise their construction.
Traffic Technicians observe the flow of traffic on roads and at intersections to find ways to make these less congested or safer.
Air Traffic Controllers are responsible for tracking and directing aircraft, keeping pilots advised of weather conditions and the positions of other planes, and preventing congestion.
Performance Analysts and Safety Engineers examine statistics and test results to determine the reliability of a vehicle.