| United States Department of Health and Human Services |
52,220 |
| United States Department of Agriculture |
30,889 |
| United States Department of Energy |
12,465 |
| United States Air Force |
11,572 |
| United States National Forest Service |
9,801 |
| USDA Agricultural Research Service |
7,493 |
| U.S. House of Representatives |
6,904 |
| Veterans Health Administration |
6,413 |
| United States Army |
5,989 |
| United States Department of Veterans Affairs |
5,829 |
| United States Postal Service |
4,394 |
| US General Services Administration (GSA) |
4,298 |
| United States Environmental Protection Agency |
4,138 |
| United States Department of Justice |
3,493 |
| United States Department of Homeland Security |
2,958 |
| Federal Aviation Administration |
2,833 |
| United States Department of the Treasury |
2,592 |
| US Department of Transportation |
2,472 |
| US Department of Labor |
2,409 |
| United States Department of State |
2,184 |
| WilmerHale LLP |
2,042 |
| US Department of Housing and Urban Development |
1,995 |
| Gallaudet University |
1,985 |
| Federal Reserve System |
1,781 |
| US Small Business Administration |
1,700 |
| Georgetown University |
1,699 |
| United States Coast Guard |
1,636 |
| Hogan & Hartson LLP |
1,630 |
| United States Department of Education |
1,504 |
| Federal Bureau of Prisons |
1,462 |
| American Red Cross |
1,423 |
| Federal Communications Commission |
1,417 |
| U.S. Army Corps of Engineers |
1,354 |
| United States Marine Corps |
1,327 |
| US Senate |
1,320 |
| United States Department of Commerce |
1,317 |
| Howard University Libraries |
1,313 |
| District of Columbia |
1,279 |
| American University |
1,234 |
| Fannie Mae |
1,164 |
| World Bank |
1,024 |
| Akin Gump Strauss Hauer |
957 |
| Venable LLP |
939 |
| Smithsonian Institution |
938 |
| US Government Accountability Office |
930 |
| Arnold & Porter LLP |
889 |
| United States Agency for International Development |
889 |
| Patton Boggs LLP |
885 |
| Covington |
867 |
| George Washington University |
857 |
| The Washington Post |
851 |
| Howrey LLP |
769 |
| Association for the Advancement of Retired Persons |
685 |
| Steptoe & Johnson LLP |
671 |
| Veterans Benefits Administration |
623 |
| McKenna Long & Aldridge LLP |
618 |
| US Dept of Energy - Office of Info. Tech (User Services Center & Security Div) |
600 |
| Crowell & Moring LLP |
600 |
| Federal Deposit Insurance Corporation |
598 |
| Arent Fox LLP |
590 |
| Dickstein Shapiro LLP |
578 |
| Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P. |
558 |
| United States Department of Defense |
553 |
| United States Senate |
529 |
| The Catholic University of America |
504 |
| U.S. International Trade Commission |
492 |
| Dept. of Commerce Bureau of Economic Analysis |
489 |
| Bureau of Reclamation |
485 |
| US Office of Personnel Management |
478 |
| The Library of Congress |
469 |
| Inter-American Development Bank |
462 |
| United States Bureau of ATF |
459 |
| United States Department of Labor - Bureau of Labor Statistics |
452 |
| The Carlyle Group |
431 |
| Peace Corps |
422 |
| National Public Radio, Inc. |
394 |
| Minerals Management Service |
388 |
| National Education Association of The United States |
385 |
| National Labor Relations Board |
384 |
| National Railroad Passenger Corporation (Amtrak) |
376 |
| International Monetary Fund |
376 |
| National Geographic Society |
364 |
| Financial Industry Regulatory Authority (FINRA) |
344 |
| Federal Emergency Management Agency |
341 |
| National Academy of Science |
333 |
| American Chemical Society |
333 |
| Pepco Holdings, Inc. |
324 |
| Hanley Wood, LLC |
320 |
| TechAmerica |
314 |
| U.S. Securities and Exchange Commission |
313 |
| Federal Trade Commission |
306 |
| Wiley Rein LLP |
302 |
| Blackboard Inc. |
302 |
| Intelsat |
300 |
| Williams & Connolly |
298 |
| Export-Import Bank of the United States |
285 |
| United States Bureau of Indian Affairs |
279 |
| Cogent Communications Group, Inc. |
278 |
| U.S. Government Printing Office (GPO) |
278 |
| American Bankers Association |
268 |
| GVA Advantis |
265 |
| Children's National Medical Center |
264 |
| American Institutes for Research |
259 |
| EEOC |
253 |
| Court Services and Offender Supervision Agency |
252 |
| Gallup, Inc. |
251 |
| Saudi Arabia Cultural Mission |
251 |
| American Federation of Teachers |
246 |
| Overseas Private Investment Corporation |
246 |
| Armstrong Teasdale LLP |
244 |
| FMCS |
238 |
| Federal Motor Carrier Safety |
233 |
| Federal Bureau of Investigation |
231 |
| Danaher Corporation |
231 |
| ASAE (American Society of Association Executives) |
227 |
| Dow Lohnes PLLC |
226 |
| Federal Energy Regulatory Commission |
217 |
| Federal Prison Industries, Inc. - UNICOR |
214 |
| Corporation for National & Community Service |
214 |
| National Association of Home Builders |
213 |
| Washington Times |
207 |
| National Endowment for the Humanities |
201 |
| Washington Metropolitan Area Transit Authority |
191 |
| Congressional Quarterly Inc. |
190 |
| Chamber of Commerce of The United States of America |
189 |
| Academy for Educational Development |
188 |
| APCO Worldwide Inc. |
185 |
| Commodity Futures Trading |
182 |
| National Journal Group Inc. |
182 |
| Federal Bureau of Investigation |
180 |
| American Association for the Advancement of Science AAAS |
179 |
| World Resources Institute (WRI) |
178 |
| Paralyzed Veterans of America |
169 |
| Association of American Medical Colleges |
167 |
| Sughrue Mion, PLLC |
164 |
| American Psychological Association |
164 |
| District of Columbia Public Schools |
163 |
| National Endowment for the Arts |
162 |
| Pension Benefit Guaranty Corporation |
162 |
| US Office of the Secretary of Defense |
159 |
| The American Institute of Architects |
159 |
| Agence France-Presse |
157 |
| U.S. News |
156 |
| Trinity University - Washington, DC |
156 |
| Chemonics International, Inc. |
156 |
| BET Inc |
155 |
| National Association of Manufacturers |
155 |
| Central Intelligence Agency (CIA) |
154 |
| American Public Works |
152 |
| Austrade |
152 |
| Service Employees International Union |
149 |
| Ross, Dixon |
148 |
| American Federation of State, County and Municipal Employees, AFL-CIO |
145 |
| National Association for the Education of Young ChILDREN |
145 |
| The Humane Society Of The United States |
142 |
| Mortgage Bankers Association |
141 |
| YWCA of the U.S.A. |
139 |
| ICMA Retirement Corporation |
137 |
| American Public Transportation Association |
137 |
| National Air Traffic Controllers Association |
137 |
| Center for Applied Linguistics |
134 |
| National Telecommunications and Information Administration (NTIA) |
132 |
| Beveridge & Diamond, P.C. |
130 |
| United States Institute of Peace |
129 |
| Brown Investment Advisory |
127 |
| American Society of Interior Designers |
127 |
| Creative Associates International, Inc. |
126 |
| National Cooperative Bank |
126 |
| Keller and Heckman LLP |
126 |
| Council for Advancement & Support of Education |
125 |
| American Farm Bureau |
124 |
| Legal Services Corporation |
124 |
| AFL-CIO |
123 |
| ULLICO Inc. |
122 |
| The Brookings Institution |
121 |
| The Kiplinger Washington Editors, Inc. |
121 |
| American Petroleum Institute |
121 |
| Communications Workers of America |
120 |
| National Retail Federation |
120 |
| Office of Surface Mining Reclamation and Enforcement |
119 |
| National Association of Letter Carriers |
119 |
| The National War College |
118 |
| Destination DC |
116 |
| Public Company Accounting Oversight Board |
115 |
| Washington National Cathedral |
115 |
| Association of Corporate Counsel |
115 |
| Edison Electric Institute |
114 |
| Washington Gas |
113 |
| National Transportation Safety Board |
112 |
| The Aspen Institute |
112 |
| Chronicle of Higher Education |
111 |
| Voice Of America |
111 |
| Visiting Nurse Associations of America |
110 |
| AOUSC |
110 |
| Independent Community Bankers of America |
109 |
| Zuckerman Spaeder LLP |
106 |
| Council of the District of Columbia |
106 |
| Providence Health System (Washington, DC) |
105 |
| Biotechnology Industry Organization |
105 |
| American Farmland Trust |
105 |
