This report examines trends in contracting by the Department of Homeland Security (DHS) and the contractor base that supports it. It takes an in-depth look at contracts for products, services, and research and development (R&D) in DHS as a whole and in six of its key components: Customs and Border Protection (CBP), the U.S. Coast Guard (USCG), the Transportation Security Administration (TSA), the Office of Procurement Operations (OPO), the Federal Emergency Management Agency (FEMA), and Immigrations and Customs Enforcement (ICE).