| United States Department of Agriculture |
57,166 |
| US Department of Veteran Affairs |
26,041 |
| Federal Aviation Administration |
25,904 |
| United States Postal Service |
24,947 |
| United States Department of Health and Human Services |
20,080 |
| National Park Service |
16,044 |
| United States Navy |
16,032 |
| United States National Forest Service |
10,642 |
| United States Air Force |
9,599 |
| US General Services Administration (GSA) |
8,923 |
| United States Department of Energy |
8,548 |
| Georgetown University |
8,159 |
| USDA Agricultural Research Service |
7,873 |
| United States Department of Homeland Security |
7,446 |
| U.S. House of Representatives |
7,336 |
| George Washington University |
5,541 |
| National Aeronautics and Space Administration |
5,500 |
| United States Environmental Protection Agency |
5,355 |
| USDA Foreign Agricultural Service (FAS) |
5,340 |
| US Department of Housing and Urban Development |
3,649 |
| US Army Corps of Engineers |
3,387 |
| United States Marine Corps (USMC) |
3,256 |
| American Red Cross |
3,180 |
| District of Columbia |
3,107 |
| United States Internal Revenue Service (IRS) |
3,025 |
| United States Coast Guard |
2,978 |
| US Department of Labor |
2,729 |
| US Department of Transportation |
2,638 |
| Federal Emergency Management Agency |
2,529 |
| US Department of State |
2,335 |
| Federal Bureau of Prisons |
2,264 |
| Federal Communications Commission |
2,146 |
| United States Department of the Treasury |
2,054 |
| Peace Corps |
1,983 |
| United States Agency for International Development |
1,922 |
| Wilmer Cutler Pickering Hale and Dorr LLP |
1,920 |
| Howard University |
1,649 |
| THE WORLD BANK |
1,604 |
| Federal National Mortgage Association (Fannie Mae) |
1,567 |
| American University Washington D.C. |
1,537 |
| US Bankruptcy Courts |
1,492 |
| Federal Deposit Insurance Corporation |
1,390 |
| Navy Bureau of Medicine and Surgery |
1,333 |
| Alstom (USA) |
1,309 |
| United States Department of Education |
1,284 |
| Federal Energy Regulatory Commission |
1,215 |
| US Dept Of Agriculture |
1,212 |
| US Government Accountability Office |
1,195 |
| Akin Gump Strauss Hauer & Feld LLP |
1,122 |
| United States Department of Commerce |
1,102 |
| Federal Bureau of Investigation |
1,084 |
| US Air Force |
1,080 |
| The Catholic University of America |
1,060 |
| AARP |
1,039 |
| Patton Boggs LLP |
1,022 |
| U.S. Senator for Alabama Jeff Sessions |
988 |
| Arnold & Porter LLP |
971 |
| U.S. Securities and Exchange Commission |
937 |
| Gallaudet University |
917 |
| Children's National Medical Center |
904 |
| United States Senate |
893 |
| The Carlyle Group |
883 |
| Organization of American States |
875 |
| Smithsonian Institution |
825 |
| Covington & Burling |
787 |
| The Library of Congress |
781 |
| Blackboard Inc. |
746 |
| Venable LLP |
741 |
| United States Department of Labor - Bureau of Labor Statistics |
723 |
| United States Bureau of ATF |
721 |
| National Geospatial Intelligence Agency |
715 |
| Financial Industry Regulatory Authority (FINRA) |
711 |
| Bureau of Reclamation |
681 |
| Veterans Benefits Administration |
680 |
| National Education Association of The United States |
646 |
| AMTRAK |
644 |
| Pepco Holdings, Inc. |
636 |
| McKenna Long & Aldridge LLP |
627 |
| Corporation for National & Community Service |
608 |
| International Monetary Fund |
594 |
| HHS |
587 |
| International Trade Administration |
586 |
| US Office of Personnel Management |
578 |
| Steptoe & Johnson LLP |
576 |
| Federal Highway Administration |
566 |
| Crowell & Moring |
565 |
| Office of Surface Mining Reclamation & Enforcement |
536 |
| Dept. of Commerce Bureau of Economic Analysis |
533 |
| USDA National Agricultural Statistics Service |
531 |
| Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. |
522 |
| Consultative Group on International Agricultural Research |
503 |
| The Washington Post Company |
503 |
| Intelsat |
491 |
| Inter-American Development Bank |
485 |
| US Courts - Office of Defender Services Training Branch |
457 |
| Hanley Wood, LLC |
454 |
| U.S. Government Printing Office (GPO) |
438 |
| International Finance Corporation |
436 |
| Smithsonian Magazine |
420 |
| National Public Radio, Inc. |
416 |
| National Labor Relations Board |
410 |
| US Dept of Energy - Office of Info. Tech (User Services Center & Security Div) |
404 |
| Arent Fox LLP |
400 |
| Small Business Administration |
396 |
| The College Board |
396 |
| U.S. International Trade Commission |
389 |
| National Geographic Society |
388 |
| National Academy of Science |
384 |
| EEOC |
372 |
| The Advisory Board Company |
370 |
| CoStar Group, Inc. |
369 |
| American Chemical Society |
359 |
| The Bureau of Ocean Energy Management, Regulation and Enforcement (BOEMRE) |
356 |
| Washington Metropolitan Area Transit Authority |
354 |
| Central Intelligence Agency (CIA) |
349 |
| American Council on Education |
345 |
| Economic Research Service |
341 |
| APCO Worldwide |
328 |
| Gallup, Inc. |
325 |
| The Humane Society Of The United States |
319 |
| Court Services and Offender Supervision Agency |
319 |
| Danaher Corp. |
314 |
| Overseas Private Investment Corporation |
309 |
| Federal Trade Commission |
300 |
| First Health Group Corporation |
288 |
| George Washington Univesity Medical Center |
278 |
| District of Columbia Public Schools |
271 |
| ICMA Retirement Corporation |
271 |
| American Federation of State, County and Municipal Employees, AFSCME, AFL-CIO |
269 |
| World Resources Institute (WRI) |
268 |
| USDA |
267 |
| Williams & Connolly |
267 |
| Washington Headquarters Services |
257 |
| National Journal Group Inc. |
254 |
| Wiley Rein LLP |
253 |
| American Bankers Association |
251 |
| AOUSC |
251 |
| W.C. & A.N. Miller Companies |
250 |
| George Washington University Medical Faculty Association |
244 |
| American Psychological Association |
243 |
| American Federation of Teachers |
243 |
| Export-Import Bank of the United States |
242 |
| Howard University Hospital |
241 |
| National Association of Home Builders |
241 |
| Chemonics International, Inc. |
240 |
| LivingSocial |
223 |
| YWCA of the U.S.A. |
223 |
| United Cerebral Palsy |
223 |
| Novak, Druce, Connolly, Bove & Quigg |
223 |
| Washington National Cathedral |
222 |
| Raffa |
221 |
| University of the District of Columbia |
216 |
| Cogent Communications Group, Inc. |
214 |
| American Institutes for Research |
214 |
| The John F. Kennedy Center for the Performing Arts |
210 |
| Association of American Medical Colleges |
209 |
| National Endowment for the Humanities |
208 |
| US Office of the Secretary of Defense |
201 |
| Voice Of America |
200 |
| Providence Hospital |
199 |
| The Brookings Institution |
198 |
| Saudi Arabia Cultural Mission |
196 |
| US Army Office of the Deputy Chief of Staff - G1 |
195 |
| American Farm Bureau |
195 |
| Dow, Lohnes, and Albertson |
194 |
| Promontory Financial Group |
193 |
| TechAmerica |
191 |
| United States Office of Government Ethics |
190 |
| National Cooperative Bank Development Corporation |
189 |
| Washington Nationals |
187 |
| National Endowment for the Arts |
187 |
| Agence France-Presse |
186 |
| Pension Benefit Guaranty Corporation |
186 |
| FMCS Federal Mediation and Conciliation Service |
184 |
| Public Company Accounting Oversight Board |
183 |
| Metro Washington Airport Authority |
182 |
| Commodity Futures Trading Commission |
178 |
| Washington International School |
175 |
| U.S. Department of the Treasury |
173 |
| BET Networks |
171 |
| Global Employment Solutions |
171 |
| Sibley Memorial Hospital |
170 |
| U.S. Chamber of Commerce |
170 |
| Broadcasting Board of Governors |
170 |
| United States Naval Research Laboratory |
169 |
| BuckleySandler LLP |
164 |
| ASAE (American Society of Association Executives) |
163 |
| Congressional Budget Office |
163 |
| United States Department of the Treasury |
158 |
| National Gallery Of Art |
158 |
| Human Capital Institute |
157 |
| Biotechnology Industry Organization |
157 |
| Greer Margolis Mitchell Burns & Associates |
156 |
| Washington Fine Properties |
155 |
| Washington Gas |
152 |
| Council for Advancement & Support of Education. |
152 |
| Donohoe Companies, Inc. |
150 |
| American Chemistry Council |
150 |
| National Association of Manufacturers |
148 |
| SES |
148 |
