Aerospace Engineers 
Specialize in the design, construction, and
maintenance of aircraft and spacecraft.

Biomedical Engineers
Specialize in the application of engineering
concepts into various aspects of medical
diagnosis, treatment, and health services.

Chemical/Biological Engineers
Specialize in the application of physical science
(chemistry and physics) with mathematics, to
the process of converting raw materials and
chemicals into more valuable forms.

Computer Engineers
Specialize in the design, planning, development,
testing, and even the manufacturing of computer
hardware as well as operating systems and other
computer software.

Electrical Engineers
Possess fundamental and practical knowledge of
electronic devices and circuits, electromagnetic
fields, electronic materials, digital signals and
systems, computers and many forms of electronic
design.

Civil & Environmental Engineers
Specialize in the planning, design, construction,
and operation of physical structures and facilities
present in modern society. These structures include
but are not limited to: bridges, tunnels, 
aiports, harbors, highways, buildings, etc.
.
Industrial Engineers
As the bridge between management goals and
optimal performance, these engineers specialize
in determining the most effective ways to utilize
basic factors of production -- people, machines,
materials, and energy -- to make a product or
provide a service.

Mechanical Engineers
Specialize in the analysis, design,
manufacturing, and maintenance of mechanical
systems associated with modern life such as
home appliances, snowboards, iPods, hybrid
automobiles, and many more.

Nuclear Engineers
Specialize in the research and development of the
processes, instruments, and systems for national
laboratories, private industry, and universities that
derive benefits from nuclear energy such as power
generation.