Archaeology is a field that involves studying and analyzing human history and civilization by examining artifacts, structures, and other remains left behind by past societies. It requires knowledge of historical research methods, fieldwork techniques, and analytical skills to interpret findings accurately. Archaeologists often work in multi-disciplinary teams and collaborate with other experts to enhance their understanding of human culture and society in the past. As a job skill, archaeology involves the ability to plan and execute excavation projects, process and analyze artifacts, and interpret findings in the context of historical and cultural knowledge.

Categorical Exclusions refer to a type of environmental review process that determines whether certain actions or projects are excluded from the requirement of undergoing a more rigorous environmental review. This specialized skill involves a thorough understanding of the environmental laws and regulations and the ability to apply them to specific projects or actions. It requires expertise in analyzing data, conducting research, and evaluating potential impacts on the environment. Those who possess this skill are able to streamline the review process and ensure that projects are in compliance with environmental standards.

The National Environmental Policy Act (NEPA) is a federal law that requires federal agencies to consider the environmental impacts of their proposed actions and to involve the public in the decision-making process. NEPA encompasses a specialized skill set that includes knowledge of environmental science, policy, and law, as well as experience in conducting environmental assessments and impact statements. Professionals skilled in NEPA are essential for ensuring that development projects are designed and implemented in a manner that minimizes harm and promotes sustainable practices.

National Historic Preservation Act (NHPA) refers to the body of requirements and practices used to identify, evaluate, and protect historic properties during planning and project review. It is applied in work that assesses whether proposed actions may affect cultural or historic resources and determines the appropriate consultation and documentation steps. The skill is used to support compliance activities, coordinate reviews with relevant parties, and help preserve historic resources in development and environmental decision making.

Prehistory is the study of human societies and cultures before written records were kept. It requires specialized skills in fields such as anthropology, archaeology, and paleontology to investigate and interpret the remains left by early humans. Key areas of study in prehistory include the development of early human tools, the origins of agriculture, the emergence of complex societies, and the evolution of language and culture. The insights gained from prehistoric studies can help us understand the origins and development of human societies, and shed light on our species' place in the natural world.