| United States Navy |
8,930 |
| United States Army |
4,072 |
| National Science Foundation |
2,473 |
| Watson Wyatt Worldwide, Inc. |
802 |
| Interstate Hotels & Resorts, Inc. |
756 |
| CACI International Inc. |
643 |
| AES Corporation |
603 |
| The Nature Conservancy |
555 |
| Arlington Career Center |
503 |
| Defense Advanced Research Projects Agency (DARPA) |
443 |
| Bureau of National Affairs, Inc. |
336 |
| The Corporate Executive Board Company |
330 |
| ENVIRON Holdings, Inc. |
319 |
| Better Business Bureau |
271 |
| Friedman, Billings, Ramsey Group, Inc. |
246 |
| Mercuri Urval USA |
216 |
| Arlington Public Schools |
201 |
| Department of Defense, United States of America |
190 |
| National Rural Electric Cooperative Association |
181 |
| Newspaper Association of America |
178 |
| Arlington County |
167 |
| American Chemistry Council |
164 |
| Strayer Education Inc. |
156 |
| American Psychiatric Association |
144 |
| Stanley Associates, Inc. |
132 |
| Vangent |
128 |
| National Defense Industrial Association |
114 |
| National Electrical Manufacturers Association |
112 |
| Greater Washington Educational Telecommunication Association |
106 |
| Airlines Reporting Corporation |
101 |
| Consumer Electronics Association |
99 |
| Associated General Contractors of America |
97 |
| Conservation International Foundation |
97 |
| U.S. Department of Defense |
97 |
| USPS OIG |
96 |
| National Association of Federal Credit Unions |
95 |
| Child Welfare League of America |
90 |
| Aerospace Industries Association |
89 |
| Dominion Electric Supply Company, Inc. |
88 |
| ICx Technologies Inc |
87 |
| Nature Serve |
85 |
| AAMVA |
85 |
| Rosetta Stone Inc. |
82 |
| The Politico |
80 |
| Virginia Hospital Center-Arlington Health Systems |
78 |
| News Channel 8 |
78 |
| American Association of School Administrators |
75 |
| EADS North America, Inc. (US Headquarters) |
71 |
| Council on Foundations Inc |
71 |
| Plateau Systems, LTD |
70 |
| National Alliance for the Mentally Ill |
67 |
| Selex Sensors & Airborne Systems Inc. |
66 |
| American Chiropractic Association |
65 |
| Virginia Commerce Bancorp, Inc. |
65 |
| Telecommunications Industry Association |
65 |
| ESI International, Inc. |
64 |
| Pepco Energy Services |
64 |
| Inside Washington Publishers |
62 |
| Kastle Systems International LLC |
59 |
| Imagine Schools |
59 |
| Analytic Services Inc. ANSER |
57 |
| Food Marketing Institute |
57 |
| EMCOR Government Services |
56 |
| Association of Fundraising Professionals |
55 |
| In-Q-Tel |
53 |
| Counterpart International, Inc. |
50 |
| Electronic Industries Alliance |
49 |
| American Society of Pension Professionals & Actuaries |
48 |
| The Air Force Association |
48 |
| Selective Service System |
48 |
| MTS Technologies, Inc. |
47 |
| National Utility Contractors Association |
46 |
| Retail Industry Leaders Association |
46 |
| Nixon |
46 |
| National Association for College Admission Counseling |
45 |
| American Association of Pharmaceutical Scientists |
44 |
| Packaging Machinery Manufacturers Institute |
43 |
| Council for Exceptional Children |
42 |
| National Apartment Association |
42 |
| metier, Ltd |
42 |
| ASET International |
42 |
| Pinkerton |
42 |
| US Trade and Development Agency |
41 |
| Bean, Kinney |
40 |
| Nathan Associates |
40 |
| National Science Teachers Association |
40 |
| MCG Capital Corporation |
39 |
| Experience Works, Inc. |
39 |
| The Accrediting Commission of Career Schools and Colleges of Technology (ACCSCT) |
38 |
| Houston Associates Inc |
37 |
| Interstate Resources, Inc. |
37 |
| AHC Inc. |
37 |
| The HealthCentral Network |
37 |
| Alcalde |
36 |
| RGS Associates Inc |
36 |
| American Composites Manufacturers Association |
36 |
| Promontory Interfinancial Network, LLC |
35 |
| U.S. Antarctic Program |
35 |
| System Planning Corporation |
35 |
| Navy LEAGUE-Us National Hdqrs |
35 |
| Air Conditioning Contractors of America |
34 |
| AMTI |
33 |
| townhall.com |
33 |
| Electronic Retailing Association |
32 |
| Strategic Analysis, Inc. |
32 |
| Tax Analysts |
32 |
| Trout Unlimited Inc |
32 |
| Defense Security Cooperation Agency |
32 |
| The Centech Group, Inc. |
31 |
| The Conservation Fund |
31 |
| National Grocers Association |
31 |
| Association of the United States Army |
31 |
| Washington Post Digital |
31 |
| Maden Technologies |
30 |
| Carana Corporation |
30 |
| Advanced Resources Intl |
29 |
| GridPoint Inc |
29 |
| Employee Relocation Council |
29 |
| Ashoka |
29 |
| Henninger Media Services |
28 |
| Air-Conditioning/Refrigeration |
28 |
| Gibbs & Cox Inc |
28 |
| National Association of Health Underwriters |
28 |
| Number Six Software Inc |
27 |
| Laughlin, Marinaccio |
27 |
| Velocitel Inc |
27 |
| Hearth, Patio and Barbecue Association |
27 |
| Kramer |
27 |
| Potomac Institute for Policy Studies |
27 |
| Infectious Diseases Society of America |
26 |
| Arlington County |
26 |
| Emerging Markets Group, Ltd |
26 |
| Comptel Communications, Inc. |
26 |
| WITH AM |
26 |
| Vestergaard Frandsen |
26 |
| Engineering Services Network |
25 |
| The Greenwich group |
25 |
| American Society of Pension Actuaries |
25 |
| Acquisition Solutions, Inc. |
25 |
| Inter-American Foundation |
25 |
| Casulaty Actuarial Society |
25 |
| GroupLogic |
24 |
| Association for the Advancement of Medical Instrumentation |
24 |
| Decisive Analytics Corporation |
24 |
| Association of Public Television Stations |
24 |
| Jorge Scientific Corp |
24 |
| Rare |
24 |
| Cyveillance, Inc. |
23 |
| DevTech Systems Inc |
23 |
| Crown Consulting Inc |
23 |
| Nuclear Waste Technical Review Board |
23 |
| Strategic Investment Group |
23 |
| Synectics for Management Decisions |
23 |
| Manufacturers Alliance |
22 |
| U.S. Dairy Export Council |
22 |
| American Anthropological Association |
22 |
| The Association of State and Territorial Health Officials |
21 |
| GHT Limited |
21 |
| American Feed Industry Association |
21 |
| Subsystem Technologies, Inc. |
20 |
| National Venture Capital Association |
20 |
| Pal-tech |
20 |
| AHL Services, Inc. |
20 |
| Valcourt Building Services |
20 |
| CadenceQuest, Inc. |
20 |
| ICx Technologies, Inc. |
20 |
| Access Worldwide Communications, Inc. |
19 |
| Applied Predictive Technologies Inc. |
19 |
| Services Group Inc |
19 |
| Millennium Engineering and Integration |
19 |
| Employee Assistance Professionals Association |
18 |
| National Milk Producers Federation |
18 |
| Professional Services Council |
18 |
| TARP Worldwide |
18 |
| Ideal Innovations |
18 |
| Keppler Associates |
17 |
| BioInformatics, LLC |
17 |
| OnPoint Consulting, Inc |
17 |
| Kadix Systems |
17 |
| Monday Properties |
17 |
| Beaconfire Consulting, Inc. |
16 |
| Biotechnology Institute |
16 |
| Generic Pharmaceutical Association |
16 |
| Stateside Associates |
16 |
| National Board For Professional Teaching Standa |
16 |
| PAE- HSC |
16 |
| Millen White Zelano & Branigan |
16 |
| National Older Worker Career Center Inc |
16 |
| Solers |
16 |
| Communities in Schools |
16 |
| Bill of Rights Institute |
16 |
| Insurance Institute for Highway Safety |
15 |
| Professional Risk Management Services, Inc. |
15 |
| Sands Capital Management, Inc. |
15 |
| International Relief and Development, Inc. |
15 |
| U.S. Wheat Associates |
15 |
| Uniform |
15 |
| Nexus Systems, Inc. |
15 |
| Worldwide ERC |
15 |
| MergeGlobal, Inc. |
14 |
