| Texas A&M University |
13,116 |
| CYPRESS-FAIRBANKS Independent School Dist |
9,393 |
| Baylor College of Medicine |
8,580 |
| Shell Oil Company |
5,131 |
| Houston Community College |
4,511 |
| Fort Bend ISD |
3,676 |
| MD Anderson Cancer Center |
3,579 |
| Waste Management, Inc. |
3,283 |
| University of Houston |
3,128 |
| SYSCO Corporation |
3,095 |
| BMC Software Inc. |
3,019 |
| Baker Hughes Incorporated |
2,832 |
| Memorial Hermann Healthcare System |
2,782 |
| Weatherford International Ltd. |
2,778 |
| KBR, Inc. |
2,596 |
| Halliburton Company |
2,573 |
| Schlumberger Limited |
2,562 |
| Kinder Morgan, Inc. |
2,483 |
| Invensys Operations Management |
2,473 |
| University of Texas Health Science Center |
2,471 |
| Lamar Consolidated Independent School District |
2,451 |
| ConocoPhillips |
2,011 |
| Tesco Corporation |
1,981 |
| Chicago Bridge & Iron Company |
1,971 |
| University of Texas Medical Branch Health |
1,847 |
| American General Life Companies |
1,779 |
| American Air Liquide Holdings, Inc. |
1,724 |
| Rice University |
1,632 |
| CenterPoint Energy, Inc. |
1,593 |
| Coldwell Banker United, Realtors |
1,430 |
| Total Petrochemicals USA, Inc. |
1,408 |
| Stephen F. Austin State University |
1,374 |
| McKesson Specialty Health |
1,325 |
| The Methodist Hospital System |
1,324 |
| Houston Independent School District |
1,300 |
| City of Houston, Texas |
1,223 |
| UniversalPegasus International |
1,221 |
| Cameron International Corporation |
1,211 |
| Insperity |
1,157 |
| Dickinson Independent School District |
1,083 |
| University of Houston - Clear Lake |
1,028 |
| Transwestern |
1,010 |
| LyondellBasell |
999 |
| UH-Downtown |
977 |
| FMC Technologies, Inc. |
968 |
| Stewart Information Services Corporation |
966 |
| Continental Airlines, Inc. |
959 |
| Anadarko Petroleum Corporation |
954 |
| Vinson & Elkins L.L.P. |
920 |
| Kelsey-Seybold Clinic |
913 |
| Cooper Industries plc |
832 |
| Baker Botts |
810 |
| The Texas A&M University System Health Science Center |
801 |
| Fort Bend County, Texas |
751 |
| American National Insurance Company |
745 |
| Hines |
698 |
| Brazosport College |
697 |
| Calpine Corporation |
687 |
| ChevronPhillips Chemical Company |
675 |
| Southern Union Company |
672 |
| Service Corporation International (SCI) |
652 |
| INEOS Americas LLC |
636 |
| Apache Corporation |
631 |
| San Jacinto College Central |
627 |
| Harris Health System |
617 |
| Sulzer Pumps, Inc. |
565 |
| Dresser-Rand Company |
559 |
| Prudential Gary Greene Realtors |
543 |
| Conroe Independent School District |
536 |
| Sam Houston State University |
517 |
| EOG Resources, Inc. |
501 |
| Clear Creek Independent School District |
491 |
| Galveston Independent School District |
490 |
| Andrews Kurth LLP |
483 |
| Barbers Hill Independent School District |
464 |
| Goose Creek Consolidated Independent School District |
463 |
| Crown Castle International Corp. |
458 |
| Enterprise Products Partners L.P. |
457 |
| Harris County, Texas |
456 |
| Mustang Engineering |
452 |
| CITGO Petroleum Corporation |
450 |
| Marathon Oil Corporation |
436 |
| GDF SUEZ Energy North America, Inc. |
426 |
| Newfield Exploration Company |
411 |
| Alvin Comm College |
401 |
| Noble Energy, Inc. |
397 |
| Southwestern Energy Company |
396 |
| Lamar University |
394 |
| Wharton County Junior College |
389 |
| Spring Branch Independent School District |
389 |
| Loomis |
386 |
| Statoil |
385 |
| CGG Veritas |
379 |
| Texas Children's Hospital |
378 |
| American Bureau of Shipping |
378 |
| College of the Mainland |
376 |
| Oceaneering International, Inc. |
373 |
| Amegy Bank of Texas |
370 |
| Academy Sports Outdoors |
369 |
| Spectra Energy Partners, L.P. |
368 |
| Cyberonics, Inc. |
364 |
| Fugro Consultants Inc |
354 |
| Saudi Basic Industries Corporation Inc. |
348 |
| Core Laboratories |
348 |
| Cornerstone Mortgage |
342 |
| Brenham Independent School District |
338 |
| Tenaris Global Services (USA) Corp |
337 |
| McDermott International, Inc. |
332 |
| The Men's Wearhouse, Inc. |
332 |
| INX, Inc. |
324 |
| New Triumph Healthcare, Llp |
323 |
| Memorial Health System of East Texas |
320 |
| United Space Alliance, LLC |
319 |
| Jones Walker LLP |
315 |
| Dynegy, Inc. |
313 |
| Katy Independent School District |
312 |
| Nabors Industries |
310 |
| Saudi Aramco |
309 |
| Region 5 Education Service Center |
307 |
| Benchmark Electronics, Inc. |
297 |
| Willis Independent School District |
297 |
| Foxconn Corporation,Hon Hai Precision Industry Co., Ltd |
294 |
| Willbros Group |
293 |
| Pearland Independent School District |
288 |
| Waste Connections, Inc. |
286 |
| Exterran Holdings, Inc. |
284 |
| Kirby Corporation |
283 |
| Key Energy Services, Inc. |
281 |
| IFCO Systems North America, Inc. |
280 |
| Humble Independent School District |
274 |
| Repsol Energy North America |
269 |
| Education Service Center Region VI |
267 |
| Quanta Services, Inc. |
263 |
| Houston Chronicle |
262 |
| Stafford Intermediate School |
262 |
| Port of Houston Authority |
261 |
| Benchmark Hospitality International |
256 |
| Westlake Chemical Corporation |
252 |
| Deer Park Independent School District |
250 |
| Houston Baptist University |
249 |
| Transocean Ltd. |
243 |
| Lee College |
233 |
| Baptist Hospitals of Southeast Texas |
232 |
| M-I, L.L.C. |
229 |
| Team Industrial Services |
229 |
| PM Realty Group Lp |
227 |
| Lamar State College, Port Arthur |
224 |
| Prosperity Bancshares, Inc. |
221 |
| Region 4 Education Service Center |
220 |
| Lufkin Industries, Inc. |
220 |
| Episcopal High School of Bellaire |
219 |
| Targa Resources Inc. |
218 |
| Wilson |
218 |
| Phillips 66 |
217 |
| Brown McCarroll, LLP |
217 |
| TietoEnator |
217 |
| Plains All American Pipeline, L.P. |
216 |
| Landry's Inc. |
215 |
| PROS Holdings, Inc. |
210 |
| Compressor Products International |
205 |
| Champion Technologies, Inc. |
205 |
| Oil States International, Inc. |
203 |
| Mitsubishi Caterpillar Forklift America, Inc. |
200 |
| Angleton Independent School District |
199 |
| ION Geophysical Corporation |
197 |
| Southwest Water Company |
197 |
| College Station Medical Center |
197 |
| Goodman Manufacturing |
193 |
| Buckeye Partners, L.P. |
193 |
| Houston Casualty Company |
192 |
| Fuddruckers |
187 |
| Plains Exploration & Production |
186 |
| Stewart & Stevenson |
184 |
| Logix |
183 |
| Bryan Independent School District |
182 |
| Royal Independent School District |
179 |
| NetIQ |
177 |
| Kraton Performance Polymers, Inc. |
172 |
| Superior Energy Services, Inc. |
172 |
| Magnolia Independent School District |
170 |
| Ohmstede Ltd. |
169 |
| Woodforest Financial Group, Inc. |
165 |
| Motiva Enterprises LLC |
165 |
| Rimkus Consulting Group |
164 |
| Boardwalk Pipeline Partners, LP |
164 |
| City of Huntsville, Texas |
163 |
| Wilhelmsen Ship Service, Inc. |
162 |
| Group 1 Automotive |
162 |
| Kvaerner Americas, Inc. |
160 |
| Inspectorate America |
159 |
| Lexicon Pharmaceuticals, Inc |
158 |
| TAS Energy Inc. |
157 |
| Germania Insurance Companies |
156 |
| Stage Stores Inc. |
152 |
| DXP Enterprises, Inc. |
151 |
| ABS Consulting, Risk Management.... |
150 |
| Enron Creditors Recovery Corporation |
149 |
| South Texas College Of Law |
148 |
| Weingarten Realty Investors |
148 |
| Victory Packaging, Inc. |
147 |
