Mechanical
Knowledge of machines and tools, including their designs, uses, repair, and maintenance.
English Language
Knowledge of the structure and content of the English language including the meaning and spelling of words, rules of composition, and grammar.
Transportation
Knowledge of principles and methods for moving people or goods by air, rail, sea, or road, including the relative costs and benefits.
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.
Coordination
Changing what is done based on other people's actions.
Engineering and Technology
Knowledge of the practical application of engineering science and technology. This includes applying principles, techniques, procedures, and equipment to the design and production of various goods and services.
Customer and Personal Service
Knowledge of principles and processes for providing customer and personal services. This includes customer needs assessment, meeting quality standards for services, and evaluation of customer satisfaction.