
Law enforcement
Work associated with the enforcement of laws, from investigation to arrest to prosecution. The primary law enforcement organizations of the U.S. government (i.e. the FBI, DEA, ATF, U.S. Marshals Service) are assigned to the Department of Justice, while the Secret Service is assigned to the Department of Homeland Security. The Department of Defense, including each of its agencies and services, also have law enforcement arms (e.g., Naval Criminal Investigative Service, Army CID), as do each of the major intelligence agencies.
300 results for Law enforcement
25 government organizations |
275 companies
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| Company Name | HQ Location | Year Est. | Employees | Revenue | Locations | Govt. Clients |
|---|---|---|---|---|---|---|
| 1 Source Consulting, Inc. | Washington, District of Columbia | 1999 | Unknown | Unknown | 3 | 3 |
| A-T Solutions, Inc. | Fredericksburg, Virginia | 2002 | 101-500 | Unknown | 7 | 12 |
| A-TEK, Inc. | Leesburg, Virginia | 1996 | 101-500 | Under $100 million | 6 | 9 |
| Abraxas Corporation | Herndon, Virginia | 2001 | 101-500 | Under $100 million | 9 | 6 |
| Accenture, Plc | Reston, Virginia | 1989 | 10,000+ | $10 billion to $50 billion | 11 | 10 |
| Access Systems | Reston, Virginia | 1992 | 101-500 | Unknown | 2 | 8 |
| ActioNet, Inc. | Vienna, Virginia | 1998 | 101-500 | Under $100 million | 2 | 4 |
| Adayana Government Group | Minneapolis, Minnesota | 2001 | 101-500 | Unknown | 3 | 2 |
| AEEC, LLC. dba American Consultants | Reston, Virginia | 1995 | 26-100 | Under $100 million | 1 | 5 |
| Agency Consulting Group, Inc. | Columbia, Maryland | 2004 | 26-100 | Under $100 million | 11 | 5 |
| Allied Associates International | Warrenton, Virginia | 2008 | 26-100 | Under $100 million | 4 | 1 |
| Allied Technology Group, Inc. | Rockville, Maryland | 1986 | 101-500 | Under $100 million | 31 | 14 |
| American Systems Corporation | Chantilly, Virginia | 1975 | 501-2,000 | $100 million to $750 million | 25 | 13 |
| Americom Government Services | Princeton, New Jersey | 2001 | 26-100 | Unknown | 2 | 5 |
| Analysts International Corporation | Minneapolis, Minnesota | 1966 | 501-2,000 | $100 million to $750 million | 2 | 1 |
| Apogee Solutions | Chesapeake, Virginia | 2002 | 26-100 | Under $100 million | 3 | 4 |
| Applied Information Sciences | Reston, Virginia | 1982 | 101-500 | Under $100 million | 4 | 4 |
| Applied Quality Communications, Inc. | Oxon Hill, Maryland | 1990 | 101-500 | Under $100 million | 1 | 2 |
| Apptis Inc. | Chantilly, Virginia | 2003 | 501-2,000 | $100 million to $750 million | 9 | 9 |
| AQIWO | Arlington, Virginia | 2002 | 26-100 | Under $100 million | 2 | 7 |
| ArcSight | Cupertino, California | 2000 | 101-500 | $100 million to $750 million | 3 | 3 |
| ArdentMC | Reston, Virginia | 2006 | <25 | Under $100 million | 3 | 5 |
| Assured Information Security, Inc. | Rome, New York | 2001 | 26-100 | Under $100 million | 1 | 7 |
| AT&T Corporation | Vienna, Virginia | 2000 | 2,001-5,000 | $10 billion to $50 billion | 44 | 18 |
| Attensity Corporation | Palo Alto, California | 2000 | 26-100 | Unknown | 1 | 4 |
| Authenti-Corp | Phoenix, Arizona | 2000 | <25 | Under $100 million | 2 | 6 |
| BAE Systems, Inc. | Rockville, Maryland | 1948 | 10,000+ | $10 billion to $50 billion | 64 | 22 |
| Battelle Memorial Institute | Columbus, Ohio | 1925 | 5,000-10,000 | $1 billion to $10 billion | 23 | 16 |
| BayFirst Solutions | Washington, District of Columbia | 2002 | 26-100 | Under $100 million | 1 | 2 |
| BB Technical Solutions LLC | Springfield, Virginia | 2007 | <25 | Under $100 million | 4 | 4 |
| Betis Group | Arlington, Virginia | 1995 | 26-100 | Unknown | 1 | 4 |
| Blackbird Technologies | Herndon, Virginia | 1997 | 101-500 | Unknown | 11 | 10 |
| Blue Canopy Federal Practice | Reston, Virginia | 2001 | 101-500 | Under $100 million | 6 | 7 |
| Bode Technology | Lorton, Virginia | 1995 | 26-100 | Unknown | 1 | 2 |
| Booz Allen Hamilton | McLean, Virginia | 1914 | 10,000+ | $1 billion to $10 billion | 69 | 26 |
| Bowhead Information Technology Services | King George, Virginia | 2003 | 101-500 | Unknown | 9 | 7 |
| Buchanan & Edwards | Arlington, Virginia | 1997 | 26-100 | Under $100 million | 2 | 3 |
| Business Integra | Greenbelt, Maryland | 2001 | 26-100 | Under $100 million | 1 | 1 |
| CACI International, Inc. | Arlington, Virginia | 1962 | 10,000+ | $1 billion to $10 billion | 74 | 26 |
| Catapult Technology Ltd | Bethesda, Maryland | 1996 | 501-2,000 | Under $100 million | 7 | 4 |
| CDS2 | Clifton, Virginia | 1994 | 26-100 | Under $100 million | 2 | 8 |
| Celerity IT LLC | McLean, Virginia | 2002 | 101-500 | Under $100 million | 15 | 5 |
| CENTRA Technology, Inc. | Arlington, Virginia | 1985 | Unknown | Unknown | 3 | 6 |
| Centurum, Inc. | Marlton, New Jersey | 1969 | 101-500 | Under $100 million | 5 | 16 |
| CGI | Fairfax, Virginia | 1976 | 10,000+ | $1 billion to $10 billion | 2 | 3 |
| Chenega | Anchorage, Alaska | 1974 | 5,000-10,000 | $750 million to $1 billion | 31 | 17 |
| Cherokee Information Services | Arlington, Virginia | 1990 | 101-500 | Under $100 million | 1 | 12 |
| Chickasaw Nation Industries | Norman, Oklahoma | 1996 | Unknown | Unknown | 9 | 2 |
| Chiliad -- "Connecting the Dots" | Amherst, Massachusetts | 1996 | <25 | Under $100 million | 3 | 6 |
| Circle Solutions | McLean, Virginia | 1980 | 101-500 | Under $100 million | 1 | 4 |
| Cobham Analytic Solutions | Columbia, Maryland | 1979 | 501-2,000 | $100 million to $750 million | 23 | 6 |
| Cody Systems | Pottstown, Pennsylvania | 1979 | 26-100 | Under $100 million | 1 | 1 |
| Cogar Group, The | Falls Church, Virginia | 2005 | 26-100 | Under $100 million | 1 | 5 |
| Cogent, Inc. | Pasadena, California | 1990 | 101-500 | $100 million to $750 million | 1 | 4 |
| Colding Technologies, LLC | Landover, Maryland | 1999 | <25 | Under $100 million | 2 | 6 |
| COLSA Corporation | Huntsville, Alabama | 1980 | 501-2,000 | $100 million to $750 million | 8 | 9 |
| Compass Systems, Inc. | Lexington Park, Maryland | 1997 | 26-100 | Under $100 million | 1 | 5 |
| Complete Data Solutions | Arlington, Virginia | 1997 | Unknown | Unknown | 2 | 2 |
| Computer Integration & Programming Solutions Corp. | Bethesda, Maryland | 1992 | <25 | Under $100 million | 1 | 3 |
| Computer Sciences Corporation | Falls Church, Virginia | 1959 | 10,000+ | $10 billion to $50 billion | 77 | 24 |
| Computer Technology Services, Inc. | Rockville, Maryland | 1983 | 101-500 | Under $100 million | 1 | 4 |
| COMSO, Inc. | Greenbelt, Maryland | 1988 | 26-100 | Under $100 million | 3 | 5 |
| COMSYS, a Manpower company | Houston, Texas | 1995 | 501-2,000 | $100 million to $750 million | 21 | 5 |
| Concurrent Technologies Corporation | Johnstown, Pennsylvania | 1987 | 501-2,000 | $100 million to $750 million | 15 | 12 |
| Confluent Corporation | Arlington, Virginia | 1996 | <25 | Unknown | 2 | 4 |
| Convera | Vienna, Virginia | 2000 | 26-100 | Under $100 million | 1 | 6 |
| Covenant Security Solutions | McLean, Virginia | 2003 | <25 | Under $100 million | 9 | 5 |
| Craig Technologies | Cape Canaveral, Florida | 1999 | Unknown | Unknown | 3 | 8 |
| Creative Computing Solutions, Inc. | Rockville, Maryland | 1992 | 101-500 | Under $100 million | 4 | 5 |
| Creative Information Technology, Inc. | Arlington, Virginia | 1996 | Unknown | Unknown | 1 | 5 |
| Criterion Systems | Vienna, Virginia | 2005 | 101-500 | Under $100 million | 1 | 8 |
| Data Computer Corporation of America | Ellicott City, Maryland | 1982 | 101-500 | Under $100 million | 4 | 7 |
| Data Networks Corporation | Reston, Virginia | 1984 | 26-100 | Under $100 million | 2 | 5 |
| Data Solutions & Technology, Inc. | Lanham, Maryland | 1994 | 101-500 | Under $100 million | 2 | 8 |
| Disys | Chantilly, Virginia | 1994 | 501-2,000 | $100 million to $750 million | 7 | 3 |
| Dynamic Science, Inc., an Exodyne Company | Phoenix, Arizona | 1942 | 101-500 | Under $100 million | 2 | 3 |
| Dynetics, Inc. | Huntsville, Alabama | 1974 | 501-2,000 | $100 million to $750 million | 7 | 10 |
| E-merging Technologies Group, Inc. | Cleveland, Ohio | 1999 | 26-100 | Under $100 million | 14 | 13 |
| Eagan, McCallister Associates, Inc., an SAIC Company | Lexington Park, Maryland | 1984 | 501-2,000 | Unknown | 2 | 10 |
| Eiden Systems Corporation | Charlottesville, Virginia | 1981 | 26-100 | Unknown | 2 | 7 |
| Enterprise Information Services, Inc. | Vienna, Virginia | 1994 | 101-500 | Under $100 million | 1 | 8 |
| Espy Corporation | Austin, Texas | 1999 | <25 | Under $100 million | 1 | 2 |
| ExecuTech Strategic Consulting | Woodbridge, Virginia | 2005 | 26-100 | Under $100 million | 1 | 4 |
| Fairfield Technologies | Washington, District of Columbia | 1990 | 26-100 | Unknown | 1 | 1 |
| Federated IT | Washington, District of Columbia | 2002 | 26-100 | Under $100 million | 3 | 4 |
| FlatIron Solutions | Boulder, Colorado | 2001 | 101-500 | Under $100 million | 1 | 4 |
| Forfeiture Support Associates, LLC | Ashburn, Virginia | 2003 | 501-2,000 | Under $100 million | 7 | 7 |
| Foxhole Technology | Fairfax, Virginia | 2007 | <25 | Under $100 million | 3 | 8 |
| FPMI Solutions, Inc. | Huntsville, Alabama | 2004 | 101-500 | Unknown | 2 | 3 |
| Fulcrum IT Services | Manassas, Virginia | 1985 | 101-500 | Under $100 million | 19 | 10 |
| G2, Inc. | Columbia, Maryland | 2001 | 26-100 | Under $100 million | 2 | 2 |
| General Dynamics | Falls Church, Virginia | 1952 | 10,000+ | $10 billion to $50 billion | 100 | 32 |
| Get-U-Started w/NT Solutions, LLC | Charlotte, North Carolina | 2000 | <25 | Under $100 million | 1 | 1 |
| Global CI | Windsor Mill, Maryland | 1992 | 26-100 | Under $100 million | 4 | 6 |
| Global Defense Technology & Systems, Inc. (GTEC) | McLean, Virginia | 1990 | 501-2,000 | $100 million to $750 million | 7 | 10 |
| Global Management Systems Inc. | Washington, District of Columbia | 1988 | 101-500 | Under $100 million | 1 | 8 |
| Global Network Systems | Rockville, Maryland | 1998 | <25 | Under $100 million | 2 | 4 |
| Glotech | Rockville, Maryland | 1995 | 26-100 | Unknown | 3 | 1 |
| GTI Federal | Frederick, Maryland | 1998 | 26-100 | Under $100 million | 1 | 5 |
| Harris Corporation | Melbourne, Florida | 1987 | 10,000+ | $1 billion to $10 billion | 29 | 17 |
| Hewlett Packard | Palo Alto, California | 1939 | 10,000+ | Above $50 billion | 25 | 18 |
| High Performance Technologies, Inc. | Reston, Virginia | 1991 | 101-500 | Under $100 million | 3 | 3 |
| HTA Technology Security Consulting | Chicago, Illinois | 2001 | 26-100 | Unknown | 7 | 2 |
| i2 Inc. | McLean, Virginia | 1990 | 101-500 | Unknown | 1 | 12 |
| IAP Worldwide Services, Inc. | Cape Canaveral, Florida | 1974 | 5,000-10,000 | $1 billion to $10 billion | 3 | 8 |
| IBM | Armonk, New York | 1924 | 10,000+ | Above $50 billion | 17 | 9 |
| IISI Corporation | North Billerica, Massachusetts | 1988 | <25 | Under $100 million | 1 | 3 |
| immixGroup | McLean, Virginia | 1997 | 101-500 | $750 million to $1 billion | 2 | 4 |
| IMTAS | Chantilly, Virginia | 1994 | 26-100 | Unknown | 3 | 1 |
| INDUS Corporation | Vienna, Virginia | 1991 | 501-2,000 | Unknown | 9 | 9 |
| INDUS Technology | San Diego, California | 1991 | 101-500 | Under $100 million | 2 | 4 |
| InfoPro, Incorporated | McLean, Virginia | 1989 | 101-500 | Unknown | 2 | 5 |
| Information Innovators, Inc. | Springfield, Virginia | 2001 | 101-500 | Under $100 million | 1 | 4 |
| Innovative Decisions, Inc. | Vienna, Virginia | 1997 | 26-100 | Under $100 million | 1 | 11 |
| Innovative Information Solutions | Leesburg, Virginia | 2004 | <25 | Under $100 million | 7 | 3 |
| Innovative Management and Technology Services | Fairmont, West Virginia | 1999 | 26-100 | Under $100 million | 1 | 9 |
| Inscope Solutions | Reston, Virginia | 2003 | 26-100 | Under $100 million | 7 | 10 |
| Institute for Defense Analyses | Alexandria, Virginia | 1956 | 501-2,000 | $100 million to $750 million | 3 | 4 |
| InTec | Vienna, Virginia | 2004 | 26-100 | Under $100 million | 11 | 4 |
| Integrated Communication Solutions, Inc. | Frederick, Maryland | 1989 | 101-500 | Under $100 million | 3 | 15 |
| IntelliDyne LLC | Falls Church, Virginia | 1999 | 101-500 | Unknown | 1 | 3 |
| Intelligent Decisions, Inc. | Ashburn, Virginia | 1988 | 101-500 | Unknown | 6 | 5 |
| Intellitactics | Reston, Virginia | 2003 | 26-100 | Unknown | 1 | 3 |
| Intelliware Systems | Fredericksburg, Virginia | 2005 | 26-100 | Under $100 million | 3 | 2 |
| Intervise Consultants | Rockville, Maryland | 1991 | 101-500 | Under $100 million | 2 | 4 |
| Invertix Corporation | McLean, Virginia | 1998 | 26-100 | Under $100 million | 8 | 8 |
| INX Inc. | Houston, Texas | 1984 | 101-500 | $100 million to $750 million | 1 | 4 |
| ISC | Oak Park, Illinois | 1989 | <25 | Unknown | 1 | 4 |
| ISYS Technologies | Littleton, Colorado | 1990 | 101-500 | Under $100 million | 21 | 7 |
| IT Catalyst Group | Rockville, Maryland | 2008 | <25 | Unknown | 2 | 1 |
| JB&A, Inc. | Falls Church, Virginia | 1988 | 101-500 | Under $100 million | 3 | 7 |
| JHM Research and Development, Inc. | Silver Spring, Maryland | 1987 | 101-500 | Unknown | 1 | 7 |
| JHT | Orlando, Florida | 1990 | 101-500 | Under $100 million | 2 | 8 |
| John C. Grimberg Co., Inc. | Rockville, Maryland | 1951 | 101-500 | $100 million to $750 million | 2 | 3 |
| K4 Solutions | Falls Church, Virginia | 2001 | 26-100 | Under $100 million | 1 | 2 |
| Kadix Systems | Arlington, Virginia | 2001 | 101-500 | Under $100 million | 4 | 12 |
| Kaseman LLC | Fairfax, Virginia | 2000 | 101-500 | Under $100 million | 2 | 3 |
| Keane Federal Systems, Inc. | McLean, Virginia | 1965 | 10,000+ | Unknown | 7 | 11 |
| Kingfisher Systems, Inc. | Alexandria, Virginia | 2005 | 26-100 | Under $100 million | 2 | 7 |
| Knight Point Systems | Dulles, Virginia | 2005 | 26-100 | Under $100 million | 1 | 5 |
| Knowledge Consulting Group | Reston, Virginia | 2000 | 101-500 | Under $100 million | 16 | 11 |
| L-3 Communications | New York, New York | 1997 | 10,000+ | $10 billion to $50 billion | 96 | 29 |
| LexisNexis Special Services Inc., a LexisNexis company | Washington, District of Columbia | 2002 | 26-100 | Unknown | 1 | 3 |
| Lockheed Martin | Bethesda, Maryland | 1995 | 10,000+ | $10 billion to $50 billion | 73 | 23 |
| Lunarline | Arlington, Virginia | 2004 | <25 | Under $100 million | 1 | 9 |
| Maden Technologies Consulting, Inc. | Arlington, Virginia | 1985 | 26-100 | Under $100 million | 4 | 6 |
| Management Analysis, Inc. | Vienna, Virginia | 1976 | 26-100 | Unknown | 1 | 10 |
| ManTech International Corporation | Fairfax, Virginia | 1968 | 5,000-10,000 | $1 billion to $10 billion | 81 | 28 |
| McMunn Associates, Inc. | Herndon, Virginia | 1992 | 101-500 | Unknown | 17 | 8 |
| McNeil Technologies | Springfield, Virginia | 1985 | 501-2,000 | $100 million to $750 million | 13 | 11 |
| MCP Computer Corporation | San Marcos, California | 1998 | <25 | Unknown | 1 | 7 |
| mediaEdge, a Division of Exceptional Software | Linthicum Heights, Maryland | 1996 | 101-500 | Unknown | 1 | 10 |
| Mele Associates | Rockville, Maryland | 1993 | 101-500 | Unknown | 1 | 8 |
| Merlin International | Englewood, Colorado | 1997 | 26-100 | Under $100 million | 3 | 2 |
| MicroSys | Manassas, Virginia | 2002 | <25 | Under $100 million | 4 | 6 |
| Miratek | El Paso, Texas | 1994 | 26-100 | Under $100 million | 2 | 10 |
| MITRE Corporation | Bedford, Massachusetts | 1958 | 5,000-10,000 | $1 billion to $10 billion | 27 | 16 |
| MNM Communications | Burtonsville, Maryland | 1991 | <25 | Under $100 million | 1 | 4 |
| Modular Space Systems | Jacksonville, Florida | 1995 | Unknown | Unknown | 1 | 3 |
| MOJA, Incorporated | Manassas, Virginia | 1995 | 26-100 | Under $100 million | 5 | 12 |
| Mosaic Inc. | Herndon, Virginia | 2001 | <25 | Under $100 million | 3 | 6 |
| MPRI, an L-3 Communications Company | Alexandria, Virginia | 1987 | Unknown | Unknown | 7 | 10 |
| MTC Services Corporation | Chula Vista, California | 1991 | 101-500 | Under $100 million | 11 | 6 |
| MultiLingual Solutions Inc. | Rockville, Maryland | 2002 | <25 | Under $100 million | 2 | 4 |
| MVM, Inc. | Ashburn, Virginia | 1979 | 2,001-5,000 | $100 million to $750 million | 3 | 2 |
| NAID | Upper Marlboro, Maryland | 1983 | 26-100 | Under $100 million | 1 | 6 |
| NANA Regional Corporation | Anchorage, Alaska | 1974 | 5,000-10,000 | $1 billion to $10 billion | 6 | 9 |
| Navstar, Inc. | Falls Church, Virginia | 1999 | 26-100 | Under $100 million | 12 | 8 |
| NBS Enterprises | Leesburg, Virginia | 2003 | <25 | Under $100 million | 7 | 1 |
| NEK Advanced Securities Group, Inc. | Colorado Springs, Colorado | 2002 | 101-500 | Unknown | 7 | 8 |
| NetStar Systems Inc. | Vienna, Virginia | 1998 | 26-100 | Unknown | 1 | 5 |
| NexOne Company | Bountiful, Utah | 2000 | 101-500 | Under $100 million | 3 | 6 |
| Nicor Global | Washington, District of Columbia | 2007 | <25 | Unknown | 1 | 6 |
| NMR Consulting | Annapolis, Maryland | 1996 | 26-100 | Under $100 million | 1 | 6 |
| Noblis | Falls Church, Virginia | 1996 | 501-2,000 | $100 million to $750 million | 4 | 3 |
| Northrop Grumman | Los Angeles, California | 1939 | 10,000+ | $10 billion to $50 billion | 98 | 27 |
| Oak Grove Technologies | Raleigh, North Carolina | 1998 | 101-500 | Under $100 million | 3 | 13 |
| Oak Ridge Associated Universities | Oak Ridge, Tennessee | 1946 | 501-2,000 | Under $100 million | 2 | 3 |
| OakHill Group, Ltd.-- | McLean, Virginia | 1996 | 26-100 | Unknown | 1 | 9 |
| Occam Solutions | Annandale, Virginia | 2001 | <25 | Unknown | 2 | 5 |
| Octo Consulting Group | Vienna, Virginia | 2006 | 26-100 | Under $100 million | 1 | 3 |
| Omega Technologies, Inc. | Fairfax, Virginia | 1997 | 26-100 | Under $100 million | 1 | 8 |
| Operational Skills Group, LLC | Seaside, California | 2000 | <25 | Unknown | 2 | 6 |
| Orizon, Inc. | Rockville, Maryland | 1998 | 26-100 | Under $100 million | 2 | 3 |
| Paradigm Solutions | Dallas, Texas | 1995 | <25 | Under $100 million | 7 | 7 |
| Pascoe Enterprises | Silver Spring, Maryland | 1995 | <25 | Unknown | 1 | 1 |
| Phacil, Inc. | Bridgewater, New Jersey | 2001 | 101-500 | Unknown | 3 | 7 |
| Pilar Services, Inc. | Laurel, Maryland | 2003 | <25 | Under $100 million | 1 | 5 |
| Platinum Solutions, Inc. | Reston, Virginia | 1999 | 26-100 | Under $100 million | 6 | 5 |
| Preferred Systems Solutions, Inc. | McLean, Virginia | 1991 | 101-500 | Unknown | 13 | 9 |
| Professional Solutions | Alexandria, Virginia | 2002 | 101-500 | Under $100 million | 4 | 11 |
| Qivliq LLC | Herndon, Virginia | 2003 | 501-2,000 | Under $100 million | 3 | 2 |
| Raytheon | Waltham, Massachusetts | 1922 | 10,000+ | $10 billion to $50 billion | 75 | 19 |
| RedBlack Communications | Hollywood, Maryland | 2007 | <25 | Unknown | 1 | 3 |
| Regal Decision Systems, Inc. | Linthicum, Maryland | 1997 | 26-100 | Under $100 million | 1 | 5 |
| Reliasource | Baltimore, Maryland | 1998 | 26-100 | Under $100 million | 2 | 1 |
| RGS Associates | Arlington, Virginia | 1984 | 101-500 | Under $100 million | 2 | 4 |
| RTGX | Columbia, Maryland | 1997 | 101-500 | Under $100 million | 16 | 7 |
| Ruchman & Associates, Inc. | Jessup, Maryland | 1981 | 101-500 | Unknown | 1 | 5 |
| SAI | Gaithersburg, Maryland | 1998 | 26-100 | Under $100 million | 1 | 4 |
| SAIC | McLean, Virginia | 1969 | 10,000+ | $10 billion to $50 billion | 123 | 33 |
| Sava LLC | Herndon, Virginia | 1971 | Unknown | Unknown | 4 | 1 |
| SCCI | Frederick, Maryland | 2002 | 101-500 | Unknown | 1 | 2 |
| Scitor Corporation | Herndon, Virginia | 1979 | 501-2,000 | $100 million to $750 million | 19 | 17 |
| SecTek, Inc | Reston, Virginia | 1992 | 501-2,000 | Unknown | 1 | 3 |
| Secure Computing and Communications, Inc. | Great Falls, Virginia | 1993 | <25 | Unknown | 1 | 5 |
| Serco North America | Reston, Virginia | 1998 | 10,000+ | $750 million to $1 billion | 13 | 15 |
| Signalscape | Cary, North Carolina | 2000 | 26-100 | Under $100 million | 1 | 3 |
| Silverback 7, Inc. | Woodbridge, Virginia | 2005 | <25 | Under $100 million | 7 | 7 |
| Sim-G Technologies | Washington, District of Columbia | 2003 | 26-100 | Under $100 million | 3 | 10 |
| Six3 Systems, Inc. | McLean, Virginia | 2009 | 101-500 | Unknown | 22 | 18 |
| SmartNet, Inc. | Frederick, Maryland | 1998 | <25 | Unknown | 1 | 4 |
| Smiths Detection | Edgewood, Maryland | 1999 | 501-2,000 | Unknown | 1 | 2 |
| SNVC | Fairfax, Virginia | 1998 | 26-100 | Under $100 million | 2 | 5 |
| SOCRATIQ | McLean, Virginia | 2005 | <25 | Unknown | 1 | 4 |
| Soft Tech Consulting | Fairfax, Virginia | 1996 | <25 | Unknown | 1 | 2 |
| Solutions Made Simple, Inc. | Reston, Virginia | 2002 | 26-100 | Under $100 million | 2 | 3 |
| Solvern Innovations, a TeleCommunication Systems company | Baltimore, Maryland | 2003 | 101-500 | Under $100 million | 3 | 7 |
| SpecTal LLC, an L-1 Identity Solutions company | Reston, Virginia | 1999 | 101-500 | Unknown | 1 | 9 |
| Spectrum Systems, Inc. | Fairfax, Virginia | 1986 | 26-100 | Under $100 million | 2 | 5 |
| SRA International, Inc. | Fairfax, Virginia | 1978 | 5,000-10,000 | $1 billion to $10 billion | 28 | 14 |
| SRC, Inc. | North Syracuse, New York | 1957 | 501-2,000 | $100 million to $750 million | 21 | 10 |
| Stanley | Arlington, Virginia | 1968 | 2,001-5,000 | $1 billion to $10 billion | 26 | 12 |
| Storage Strategies | Springfield, Virginia | 2007 | <25 | Unknown | 3 | 4 |
| Strategic Analysis Inc. | Arlington, Virginia | 1986 | 101-500 | Under $100 million | 2 | 5 |
| Sun Microsystems | McLean, Virginia | 1984 | 101-500 | Unknown | 1 | 8 |
| Superlative Technologies | Ashburn, Virginia | 1996 | 101-500 | Under $100 million | 4 | 7 |
| Synteras LLC | Herndon, Virginia | 1999 | 501-2,000 | Under $100 million | 2 | 15 |
| Systems Engineering, Inc. | Dulles, Virginia | 1987 | <25 | Under $100 million | 2 | 5 |
| Systems Planning Corporation | Arlington, Virginia | 1970 | 101-500 | Under $100 million | 1 | 9 |
| T-Rex Corporation | Reston, Virginia | 1999 | 26-100 | Under $100 million | 2 | 1 |
| Tangible Software, Inc. | Bethesda, Maryland | 1998 | 26-100 | Under $100 million | 2 | 1 |
| TeAM LLC | San Antonio, Texas | 2002 | <25 | Unknown | 1 | 4 |
| TechGuard Security | Chesterfield, Missouri | 2000 | 26-100 | Under $100 million | 1 | 2 |
| Technatomy Corporation | Fairfax, Virginia | 2000 | 26-100 | Under $100 million | 1 | 3 |
| Technical and Management Resources | Arlington, Virginia | 1979 | 26-100 | Under $100 million | 4 | 7 |
| Technology Development Group, Inc. | Shawnee, Oklahoma | 1993 | 26-100 | Under $100 million | 3 | 4 |
| Technology Resource Support | Huntsville, Alabama | 2000 | <25 | Under $100 million | 1 | 3 |
| TechWise | Colorado Springs, Colorado | 1994 | 26-100 | Under $100 million | 2 | 8 |
| Tektron Micro Electronics, Inc. | Pennsauken, New Jersey | 1968 | <25 | $100 million to $750 million | 2 | 5 |
| TestPros | Reston, Virginia | 1988 | 26-100 | Under $100 million | 6 | 3 |
| TEXCOM Inc. | Portsmouth, Virginia | 1982 | 26-100 | Under $100 million | 2 | 2 |
| ThruPoint | N.Y., New York | 1993 | 101-500 | Under $100 million | 1 | 1 |
| TISTA Science and Technology Corporation | Bethesda, Maryland | 2005 | <25 | Under $100 million | 1 | 5 |
| Trident Systems, Inc. | Fairfax, Virginia | 1985 | 101-500 | Under $100 million | 2 | 5 |
| Trinity Technology Group | Fairfax, Virginia | 2002 | 101-500 | Under $100 million | 5 | 4 |
| Truestone | Herndon, Virginia | 2003 | 501-2,000 | Under $100 million | 10 | 4 |
| Trusted Mission Solutions | McLean, Virginia | 2001 | 26-100 | Under $100 million | 1 | 4 |
| TurningPoint Global Solutions | Rockville, Maryland | 2002 | 101-500 | Under $100 million | 1 | 1 |
| Tygart Technology Inc. | Fairmont, West Virginia | 1991 | <25 | Under $100 million | 3 | 6 |
| Unisys | Blue Bell, Pennsylvania | 1986 | 10,000+ | $100 million to $750 million | 10 | 8 |
| Universal Systems & Technology, Inc., a Lockheed Martin Company | Centreville, Virginia | 1988 | 101-500 | Unknown | 2 | 7 |
| USGC, Inc. | Annapolis, Maryland | 1999 | 26-100 | Under $100 million | 6 | 12 |
| V-Tech Solutions | Silver Spring, Maryland | 2000 | Unknown | Under $100 million | 2 | 4 |
| Van Dyke Technology Group | Columbia, Maryland | 2002 | 26-100 | Unknown | 7 | 5 |
| Vangent, Inc. | Arlington, Virginia | 1962 | 5,000-10,000 | $100 million to $750 million | 2 | 2 |
| Verint Systems, Inc. | Melville, New York | 1994 | 2,001-5,000 | $100 million to $750 million | 1 | 2 |
| Vets Inc. | Vienna, Virginia | 2005 | 26-100 | Under $100 million | 2 | 7 |
| ViaTech Systems | McLean, Virginia | 1984 | 101-500 | Under $100 million | 4 | 5 |
| Visionary Integration Professionals | Alexandria, Virginia | 1996 | Unknown | Under $100 million | 9 | 1 |
| Vistronix | Reston, Virginia | 1990 | 101-500 | Under $100 million | 2 | 4 |
| Visual Analytics, Inc. | Poolesville, Maryland | 1998 | 26-100 | Under $100 million | 2 | 13 |
| Visual Purple | San Luis Obispo, California | 1998 | <25 | Under $100 million | 1 | 5 |
| Vitech | Vienna, Virginia | 1992 | 26-100 | Under $100 million | 1 | 3 |
| VizorNet, Inc. | Fairfax Station, Virginia | 2003 | <25 | Under $100 million | 1 | 5 |
| WareOnEarth Communications Inc. | North Charleston, South Carolina | 2002 | 101-500 | Unknown | 6 | 6 |
| Washington Technology Group | Silver Spring, Maryland | 1999 | 26-100 | Unknown | 2 | 5 |
| Windmill International | Nashua, New Hampshire | 1988 | 101-500 | Unknown | 1 | 3 |
| Worldwide Information Network Systems | Seabrook, Maryland | 2000 | Unknown | Unknown | 2 | 5 |
| WRSystems, Ltd. | Norfolk, Virginia | 1992 | Unknown | Unknown | 3 | 7 |
| Wyle | El Segundo, California | 1949 | 2,001-5,000 | $100 million to $750 million | 12 | 8 |
| York Telecom | Eatontown, New Jersey | 1985 | 101-500 | Unknown | 2 | 7 |
| Zekiah Technologies | La Plata, Maryland | 1996 | 26-100 | Under $100 million | 3 | 7 |
| Zel Technologies LLC | Hampton, Virginia | 1988 | 101-500 | Under $100 million | 25 | 9 |
| Zenetex | Herndon, Virginia | 1999 | 26-100 | Under $100 million | 2 | 4 |






















