Top federal contractors for NAICS 561621.

Serco INC

Herndon, VA · Department of Defense

Paragon Systems INC

Herndon, VA · Department of Homeland Security

Olgoonik Global Security, Llc.

Anchorage, AK · Department of State

Triple Canopy INC

Herndon, VA · Department of State

M. C. Dean, Inc.

Tysons, VA · Department of Defense

Centerra Group, LLC

Herndon, VA · Department of Energy

Johnson Controls Building Automation Systems, LLC

Huntsville, AL · Department of Defense

Alutiiq Global Solutions, LLC

Anchorage, AK · Department of Defense

Chenega Global Protection, LLC

Chantilly, VA · National Aeronautics and Space Administration

Siemens Government Technologies INC

Arlington, VA · Department of Defense

Caddell Construction Co. (de), LLC

Montgomery, AL · Department of State

Muscogee Nation Business Enterprise

Okmulgee, OK · Department of Defense

The Whitestone Group, Inc.

Reynoldsburg, OH · Department of Transportation

Olgoonik Solutions LLC

Anchorage, AK · Department of State

Advanced It Concepts, LLC

Orlando, FL · Department of Defense

Chenega Security International California

Chantilly, VA · Department of the Interior

Chenega Security International, LLC

Chantilly, VA · Department of Defense

Agency Management Concepts INC

Oakton, VA · Department of Defense

Chenega Infinity, LLC

Chantilly, VA · Department of Homeland Security

Alutiiq Advanced Security Solutions LLC

Anchorage, AK · Department of Homeland Security

Venesco Construction Management LLC

Chantilly, VA · Department of State

Alutiiq Business Services, LLC

Anchorage, AK · Department of Defense

M.c. Dean Europe Gmbh

Leinfelden-echterdingen · Department of Defense

Kratos Defense & Security Solutions, Inc.

San Diego, CA · Department of Homeland Security