| National Institutes of Health |
17,303 |
| University System of Maryland |
12,429 |
| Indian Health Service |
12,139 |
| Food & Drug Administration |
11,011 |
| Lockheed Martin Corporation |
7,000 |
| Community College of Baltimore County |
6,138 |
| Marriott International, Inc. |
4,920 |
| Johns Hopkins University |
4,159 |
| State of Maryland |
4,059 |
| Montgomery County Public Schools |
3,565 |
| Towson University |
2,988 |
| National Oceanic and Atmospheric Administration |
2,957 |
| Social Security Administration |
2,709 |
| Cecil County Public Schools |
2,294 |
| Board Education Prince George County |
2,289 |
| Montgomery College |
2,093 |
| University of Maryland Eastern Shore |
1,801 |
| National Cancer Institute |
1,491 |
| Anne Arundel Community College |
1,480 |
| The University of Maryland, Baltimore County |
1,462 |
| Baltimore County Public Schls |
1,397 |
| Loyola College in Maryland |
1,339 |
| Aerotek, Inc. |
1,259 |
| Morgan State University |
1,191 |
| TEKsystems, Inc. |
1,151 |
| The Black & Decker Corporation |
1,067 |
| Discovery Communications, Inc. |
1,056 |
| T. Rowe Price Group, Inc. |
1,048 |
| US Nuclear Regulatory Commission |
1,039 |
| Bechtel Corporation |
1,032 |
| Frederick County Public Schools |
989 |
| Choice Hotels International, Inc. |
969 |
| Baltimore City Community College |
910 |
| Bowie State University |
903 |
| Constellation Energy Group, Inc. |
871 |
| CIENA Corporation |
863 |
| Frostburg State University |
826 |
| Salisbury State University |
796 |
| FTI Consulting, Inc. |
785 |
| National Institute of Standards and Technology |
751 |
| The Ritz-Carlton Hotel Company, L.L.C. |
713 |
| University of Baltimore |
679 |
| USDA Animal and Plant Health inspection Service |
675 |
| U.S. Census Bureau |
633 |
| GEICO |
623 |
| Coppin State University |
613 |
| Charles County Public Schools |
605 |
| The Maryland-National Capital Park and Planning Commission |
591 |
| ARINC Incorporated |
582 |
| Legg Mason, Inc. |
574 |
| OPNET Technologies, Inc. |
569 |
| CareFirst, Inc. |
553 |
| Goucher College |
553 |
| MedImmune, Inc. |
544 |
| Coldwell Banker - MD |
538 |
| Anne Arundel County Public Schools |
538 |
| Sinclair Broadcast Group, Inc. |
535 |
| Space Telescope Science Institute |
515 |
| Charles County Government - La Plata, MARYLAND |
515 |
| The Baltimore Sun |
502 |
| Howard Community College |
498 |
| Maryland Department of Health and Mental Hygiene |
497 |
| The National Archives and Records Administration |
487 |
| Centers for Medicare and Medicaid Services |
462 |
| Perdue Farms Incorporated |
458 |
| MedStar Health |
444 |
| PSC IRMS |
438 |
| Coventry Health Care, Inc. |
437 |
| Columbia Union College |
409 |
| Johns Hopkins Bloomberg School of Public Health |
376 |
| Washington College |
375 |
| Aggregate Industries Inc |
373 |
| Presidio Networked Solutions |
370 |
| Maryland MVA |
370 |
| Health Resources and Services Administration |
369 |
| McCormick |
362 |
| MD Institute, College of Art |
355 |
| Maryland School for the Deaf |
352 |
| Otsuka Maryland Research Institute |
351 |
| Frederick County Govt |
345 |
| Center for Drug Evaluation and Research |
342 |
| Hughes Network Systems, LLC |
338 |
| Howard County Public Schools |
333 |
| Hagerstown Community College |
331 |
| Chevy Chase Bank, F.S.B. |
322 |
| Frederick Community College |
322 |
| Maxim Healthcare Services, Inc. |
320 |
| Vertis Inc. |
314 |
| W. R. Grace |
310 |
| Maryland Department of Budget and Management |
300 |
| CitiFinancial |
300 |
| Meade Realty |
296 |
| Fundamental Long Term Care |
292 |
| National Institute of Allery and Infectious Diseases |
280 |
| NCI-Frederick |
277 |
| American Capital, Ltd. |
274 |
| College of Notre Dame of Maryland |
272 |
| Pitney Bowes Business Insight |
272 |
| Precision Tune Auto Care |
268 |
| Harford Community College |
263 |
| Maryland Department of Housing and Commu |
259 |
| Sodexo, Inc. |
255 |
| Montgomery County Deptartment of Transportation - Transit Services |
253 |
| United States Naval Academy |
253 |
| Miles & Stockbridge P.C. |
253 |
| Baltimore City Government |
245 |
| Arbitron Inc. |
243 |
| Clark Construction Group, LLC |
240 |
| McAfee Inc |
235 |
| SafeNet, Inc. |
230 |
| AAI Corporation |
230 |
| Baltimore Washington International Airport |
227 |
| Hydro Aluminum North America |
224 |
| Baltimore Gas and Electric Company |
223 |
| LifeBridge Health, Inc. |
221 |
| Westat, Inc. |
221 |
| GXS, Inc |
216 |
| Chesapeake College |
215 |
| Radio One, Inc. |
215 |
| Anne Arundel Health System |
214 |
| Maryland State Highway Administration |
214 |
| Reznick Group, P.C. |
213 |
| Hanger Orthopedic Group, Inc. |
213 |
| Greater Baltimore Medical Center Healthcare |
212 |
| Merkle Inc. |
210 |
| MICROS Systems, Inc. |
206 |
| Areva NC Inc |
205 |
| Adventist HealthCare, Inc. |
205 |
| Erickson Retirement Communities |
204 |
| Prince George's County, Maryland |
200 |
| Stevenson University |
199 |
| The Whiting-Turner Contracting Company |
192 |
| RTKL Associates Inc. |
189 |
| Human Genome Sciences, Inc. |
182 |
| Digital Sports |
178 |
| Ferris, Baker Watts Incorporated |
177 |
| Goodwill Industries International |
177 |
| Ober, Kaler, Grimes & Shriver |
176 |
| Whiteford, Taylor |
176 |
| Associated Catholic Charities, Inc. |
175 |
| USEC Inc. |
171 |
| Bon Secours Health System |
168 |
| Calvert County Public Schools |
166 |
| Holy Cross Hospital |
165 |
| Sandy Spring Bancorp, Inc. |
162 |
| Allegis Group, Inc. |
162 |
| KCI Technologies, Inc. |
161 |
| Uniformed Services University of the Health Sciences |
161 |
| Colliers Pinkard |
161 |
| RWD Technologies, Inc. |
161 |
| HMSHost Corporation |
161 |
| Child Care Administration |
160 |
| CoStar Group, Inc. |
158 |
| National Security Agency/Central Security Service |
157 |
| Carroll Community College |
156 |
| Maryland Department of Natural Resources |
156 |
| Dunbar Armored Inc |
154 |
| Maryland State Department of Education |
154 |
| Danfoss Inc |
148 |
| General Physics Corporation |
147 |
| Giant Food LLC |
147 |
| State of Maryland Department of Housing |
145 |
| Nabi Biopharmaceuticals |
144 |
| Wor-Wic Community College |
141 |
| Post Newsweek Tech Media Group |
140 |
| Century 21 New Millenium |
139 |
| Bon Secours Health System, Inc. |
137 |
| Wicomico Cnty Board-Education |
137 |
| Cystic Fibrosis Foundation |
136 |
| St. Mary's College of Maryland |
136 |
| CapitalSource Inc. |
135 |
| Montgomery County's (Maryland) school |
135 |
| TESSCO Technologies Incorporated |
134 |
| American Speech-Language-Hearing Association |
133 |
| Maryland Department of Agriculture |
132 |
| Baltimore City Public School |
132 |
| Howard Hughes Medical Institute |
132 |
| American Society of Health-System Pharmacists |
128 |
| United BioSource Corp |
126 |
| Southern Maryland Hospital |
125 |
| Maryland Transit Administration |
125 |
| National Institute of Neurological Disorders and Stroke |
125 |
| Glenbrook Properties |
124 |
| Harford County Public Schools |
122 |
| TeleCommunication Systems, Inc. |
119 |
| Our Lady of Good Counsel High School |
119 |
| Dorchester County Board Of Education |
119 |
| U.S. Pharmacopeia |
118 |
| Emergency Medicine Associates |
118 |
| Department of Public Safety and Correctional Services |
116 |
| Under Armour, Inc. |
116 |
| AWS Convergence Technologies, Inc. |
115 |
| Access Intelligence, LLC |
115 |
| Advertising.com, Inc. |
115 |
| Ritz Camera Centers, Inc. |
115 |
| Queen Anne's County Board of Education |
115 |
| Maryland Automobile Insurance Fund |
113 |
| US Consumer Product Safety Commission |
110 |
| Williams Scotsman, Inc. |
109 |
| Peninsula Regional Medical Center |
108 |
