- Mechanical - Knowledge of machines and tools, including their designs, uses, repair, and maintenance.
- Public Safety and Security - Knowledge of relevant equipment, policies, procedures, and strategies to promote effective local, state, or national security operations for the protection of people, data, property, and institutions.
- Administration and Management - Knowledge of business and management principles involved in strategic planning, resource allocation, human resources modeling, leadership technique, production methods, and coordination of people and resources.
- Mathematics - Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.