| United States Department of Agriculture |
57,134 |
| Federal Aviation Administration |
26,006 |
| US Department of Veteran Affairs |
25,724 |
| United States Postal Service |
25,674 |
| United States Department of Health and Human Services |
20,092 |
| National Park Service |
16,058 |
| United States Navy |
15,971 |
| United States National Forest Service |
10,546 |
| United States Air Force |
9,467 |
| US General Services Administration (GSA) |
8,948 |
| United States Department of Energy |
8,530 |
| Georgetown University |
8,137 |
| USDA Agricultural Research Service |
7,865 |
| United States Department of Homeland Security |
7,231 |
| U.S. House of Representatives |
6,718 |
| National Aeronautics and Space Administration |
5,563 |
| George Washington University |
5,543 |
| USDA Foreign Agricultural Service (FAS) |
5,338 |
| United States Environmental Protection Agency |
5,180 |
| US Department of Housing and Urban Development |
3,555 |
| US Army Corps of Engineers |
3,331 |
| United States Marine Corps (USMC) |
3,188 |
| American Red Cross |
3,097 |
| District of Columbia |
3,087 |
| United States Internal Revenue Service (IRS) |
2,960 |
| United States Coast Guard |
2,930 |
| US Department of Labor |
2,539 |
| Federal Emergency Management Agency |
2,495 |
| US Department of Transportation |
2,432 |
| Federal Bureau of Prisons |
2,179 |
| Federal Communications Commission |
2,128 |
| United States Department of the Treasury |
2,051 |
| Peace Corps |
1,977 |
| Wilmer Cutler Pickering Hale and Dorr LLP |
1,908 |
| United States Agency for International Development |
1,864 |
| Howard University |
1,648 |
| THE WORLD BANK |
1,622 |
| Federal National Mortgage Association (Fannie Mae) |
1,562 |
| American University Washington D.C. |
1,522 |
| US Bankruptcy Courts |
1,487 |
| US Department of State |
1,378 |
| Federal Deposit Insurance Corporation |
1,363 |
| Navy Bureau of Medicine and Surgery |
1,317 |
| Alstom (USA) |
1,292 |
| United States Department of Education |
1,231 |
| Federal Energy Regulatory Commission |
1,228 |
| US Dept Of Agriculture |
1,191 |
| US Government Accountability Office |
1,159 |
| Akin Gump Strauss Hauer & Feld LLP |
1,120 |
| United States Department of Commerce |
1,101 |
| Federal Bureau of Investigation |
1,069 |
| The Catholic University of America |
1,063 |
| Patton Boggs LLP |
1,049 |
| AARP |
1,025 |
| US Air Force |
1,009 |
| Arnold & Porter LLP |
951 |
| Gallaudet University |
920 |
| The Carlyle Group |
919 |
| United States Senate |
898 |
| Organization of American States |
870 |
| U.S. Securities and Exchange Commission |
857 |
| Children's National Medical Center |
842 |
| U.S. Senator for Alabama Jeff Sessions |
823 |
| Covington & Burling |
785 |
| The Library of Congress |
763 |
| Blackboard Inc. |
736 |
| United States Department of Labor - Bureau of Labor Statistics |
728 |
| Smithsonian Institution |
726 |
| Venable LLP |
725 |
| National Geospatial Intelligence Agency |
714 |
| Financial Industry Regulatory Authority (FINRA) |
705 |
| Veterans Benefits Administration |
683 |
| United States Bureau of ATF |
678 |
| Pepco Holdings, Inc. |
667 |
| AMTRAK |
663 |
| Bureau of Reclamation |
657 |
| National Education Association of The United States |
652 |
| McKenna Long & Aldridge LLP |
623 |
| Corporation for National & Community Service |
617 |
| HHS |
584 |
| International Monetary Fund |
584 |
| US Office of Personnel Management |
574 |
| U.S. Department of Transportation Federal Highway Administration |
569 |
| International Trade Administration |
540 |
| Steptoe & Johnson LLP |
535 |
| Office of Surface Mining Reclamation & Enforcement |
535 |
| Dept. of Commerce Bureau of Economic Analysis |
533 |
| Crowell & Moring |
530 |
| Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. |
527 |
| USDA National Agricultural Statistics Service |
525 |
| Consultative Group on International Agricultural Research |
496 |
| The Washington Post Company |
493 |
| Intelsat |
493 |
| Inter-American Development Bank |
478 |
| Hanley Wood, LLC |
460 |
| US Courts - Office of Defender Services Training Branch |
457 |
| International Finance Corporation |
433 |
| U.S. Government Printing Office (GPO) |
433 |
| Smithsonian Magazine |
420 |
| National Public Radio, Inc. |
412 |
| Arent Fox LLP |
404 |
| US Dept of Energy - Office of Info. Tech (User Services Center & Security Div) |
404 |
| National Labor Relations Board |
391 |
| The College Board |
387 |
| National Academy of Science |
383 |
| National Geographic Society |
381 |
| U.S. International Trade Commission |
374 |
| The Advisory Board Company |
369 |
| The Bureau of Ocean Energy Management, Regulation and Enforcement (BOEMRE) |
364 |
| Washington Metropolitan Area Transit Authority |
359 |
| EEOC |
353 |
| American Chemical Society |
350 |
| Central Intelligence Agency (CIA) |
349 |
| American Council on Education |
348 |
| Economic Research Service |
341 |
| APCO Worldwide |
340 |
| Gallup, Inc. |
337 |
| The Humane Society Of The United States |
336 |
| Small Business Administration |
333 |
| Overseas Private Investment Corporation |
320 |
| Danaher Corp. |
312 |
| Federal Trade Commission |
299 |
| CoStar Group, Inc. |
299 |
| Court Services and Offender Supervision Agency |
298 |
| First Health Group Corporation |
288 |
| George Washington Univesity Medical Center |
282 |
| District of Columbia Public Schools |
273 |
| World Resources Institute (WRI) |
270 |
| National Journal Group Inc. |
259 |
| American Psychological Association |
257 |
| Washington Headquarters Services |
256 |
| W.C. & A.N. Miller Companies |
254 |
| BET Networks |
251 |
| American Bankers Association |
251 |
| Chemonics International, Inc. |
249 |
| National Association of Home Builders |
249 |
| Wiley Rein LLP |
248 |
| USDA |
245 |
| Howard University Hospital |
245 |
| Export-Import Bank of the United States |
245 |
| George Washington University Medical Faculty Association |
244 |
| American Federation of Teachers |
242 |
| LivingSocial |
240 |
| Novak, Druce, Connolly, Bove & Quigg |
237 |
| United Cerebral Palsy |
226 |
| YWCA of the U.S.A. |
225 |
| AOUSC |
224 |
| Raffa |
220 |
| Washington National Cathedral |
219 |
| University of the District of Columbia |
216 |
| ICMA Retirement Corporation |
212 |
| Association of American Medical Colleges |
209 |
| American Farm Bureau |
208 |
| Agence France-Presse |
207 |
| Williams & Connolly |
205 |
| Saudi Arabia Cultural Mission |
204 |
| The John F. Kennedy Center for the Performing Arts |
204 |
| National Endowment for the Humanities |
201 |
| US Office of the Secretary of Defense |
200 |
| Providence Hospital |
199 |
| Cogent Communications Group, Inc. |
199 |
| Voice Of America |
198 |
| US Army Office of the Deputy Chief of Staff - G1 |
196 |
| American Institutes for Research |
196 |
| American University Dubai |
194 |
| TechAmerica |
194 |
| Dow, Lohnes, and Albertson |
194 |
| Promontory Financial Group |
190 |
| United States Office of Government Ethics |
188 |
| Washington Nationals |
187 |
| National Endowment for the Arts |
187 |
| Pension Benefit Guaranty Corporation |
186 |
| National Cooperative Bank Development Corporation |
185 |
| Public Company Accounting Oversight Board |
180 |
| The Brookings Institution |
179 |
| Metro Washington Airport Authority |
178 |
| Global Employment Solutions |
176 |
| FMCS Federal Mediation and Conciliation Service |
175 |
| Washington International School |
174 |
| Sibley Memorial Hospital |
173 |
| Commodity Futures Trading Commission |
170 |
| United States Naval Research Laboratory |
169 |
| BuckleySandler LLP |
165 |
| Broadcasting Board of Governors |
165 |
| American Federation of State, County and Municipal Employees, AFSCME, AFL-CIO |
165 |
| U.S. Chamber of Commerce |
163 |
| Congressional Budget Office |
157 |
| Washington Fine Properties |
157 |
| Human Capital Institute |
156 |
| Caplin and Drysdale |
155 |
| Biotechnology Industry Organization |
154 |
| Greer Margolis Mitchell Burns & Associates |
154 |
| ASAE (American Society of Association Executives) |
154 |
| American Chemistry Council |
151 |
| Federal Prison Industries, Inc. - UNICOR |
150 |
| Council for Advancement & Support of Education. |
150 |
| Archstone |
148 |
| Mortgage Bankers Association |
148 |
| Washington Gas |
148 |
| National Association of Manufacturers |
148 |
