Devise methods to improve oil and gas extraction and production and determine the need for new or modified tool designs. They oversee drilling and offer technical advice.

Conduct research on nuclear engineering projects or apply principles and theory of nuclear science to problems concerned with release, control, and use of nuclear energy and nuclear waste disposal.

Conduct sub surface surveys to identify the characteristics of potential land or mining development sites. They specify the ground support systems, processes and equipment for safe, economical, and environmentally sound extraction or underground construction activities. They inspect areas for unsafe geological conditions, equipment, and working conditions.

Develop new or improved designs for vehicle structural members, engines, transmissions, or other vehicle systems, using computer assisted design technology. They direct building, modification, or testing of vehicle or components.

Design, evaluate, modify, or construct fuel cell components or systems for transportation, stationary, or portable applications.

Perform engineering duties in planning and designing tools, engines, machines, and other mechanically functioning equipment. They oversee installation, operation, maintenance, and repair of equipment such as centralized heat, gas, water, and steam systems.

Evaluate materials and develop machinery and processes to manufacture materials for use in products that must meet specialized design and performance specifications. They develop new uses for known materials. This includes working with graphite, metal and metal alloys, ceramics and glass, plastics and polymers, and naturally occurring materials.

Design and oversee construction and repair of marine craft and floating structures such as ships, barges, tugs, dredges, submarines, torpedoes, floats, and buoys. They confer with marine engineers.

Design, develop, and take responsibility for the installation of ship machinery and related equipment including propulsion machines and power supply systems.

Design objects, facilities, and environments to optimize human well being and overall system performance, applying theory, principles, and data regarding the relationship between humans and respective technology. They investigate and analyze characteristics of human behavior and performance as it relates to the use of technology.