Wikipedia

List of U.S. security clearance terms terminology and lettering, as is discussed below. Security clearance levels often appear in employment postings for Defense related jobs, and other jobs
Diplomatic Security Service The United States Diplomatic Security Service (DSS or DS) is the federal law enforcement and security arm of the United States Department of State. Its
U.S. Immigration and Customs Enforcement Department of Homeland Security (DHS). ICE has two primary components: Homeland Security Investigations (HSI) and Enforcement and Removal Operations (ERO)
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