This series covers positions concerned with advising on, administering, supervising, or performing work in the collection, analysis, evaluation, interpretation, and dissemination of information on political, economic, social, cultural, physical, geographic, scientific, or military conditions, trends, and forces in foreign and domestic areas that directly or indirectly affect the national security. These positions require a basic knowledge and understanding of one or more of the natural or social sciences, engineering, or military science, but do not demand, as a primary qualification requirement, full knowledge of the current state of the art.