| Geosyntec Consultants, Inc. |
58 | $96,522 |
| WSP USA Inc. |
33 | $97,573 |
| Carollo Engineers, Inc. |
31 | $93,504 |
| California Air Resources Board |
26 | $106,692 |
| Stantec Consulting Services Inc. |
26 | $105,560 |
| The Trustees of Princeton University |
24 | $66,326 |
| Arcadis U.S., Inc. |
21 | $92,310 |
| UChicago Argonne LLC |
21 | $92,768 |
| Jacobs Engineering Group Inc. |
19 | $105,627 |
| AECOM Technical Services, Inc. |
18 | $93,656 |
| Energy and Environmental Economics, Inc. |
16 | $114,608 |
| Langan Engineering and Environmental Services, LLC |
15 | $80,974 |
| Distinct Engineering Solutions Inc |
13 | $93,080 |
| Battelle Memorial Institute |
12 | $115,522 |
| Black & Veatch Corporation |
9 | $101,098 |
| W.M. Rice University |
9 | $62,421 |
| Lawrence Berkeley National Laboratory |
8 | $90,666 |
| Ramboll Americas Engineering Solutions, Inc |
8 | $100,000 |
| The University of Texas at Austin |
8 | $92,123 |
| State of Washington Department of Ecology |
8 | $90,000 |
| Environmental Resources Management, Inc. |
8 | $138,520 |
| SLR International Corporation |
7 | $105,000 |
| City of Philadelphia |
7 | $83,921 |
| NCS Engineers, LLC |
7 | $83,200 |
| Stearns, Conrad and Schmidt Consulting Engineering, Inc. |
7 | $95,659 |
| CDM Smith Inc. |
7 | $94,349 |
| Brown and Caldwell |
7 | $98,000 |
| KeyLogic LLC |
7 | $102,674 |
| Ut-Battelle, LLC (Oak Ridge National Laboratory) |
7 | $112,247 |
| Ernst & Young U.S. LLP |
6 | $118,264 |
| University of Connecticut |
6 | $89,658 |
| Larry Walker Associates, Inc. |
6 | $81,007 |
| Massachusetts Institute of Technology |
6 | $66,950 |
| University of Illinois |
6 | $84,344 |
| Research Foundation of CUNY |
5 | $76,695 |
| Montrose Environmental Group Inc. |
5 | $65,437 |
| California Energy Commission |
5 | $104,604 |
| South Coast Air Quality Management District |
5 | $100,806 |
| Tetra Tech, Inc. |
5 | $107,000 |
| Haley & Aldrich, Inc. |
5 | $84,000 |
| Berkshire Hathaway Specialty Insurance Company |
5 | $152,000 |
| Civil & Environmental Consultants, Inc. |
5 | $78,291 |
| TRC Environmental Corporation |
5 | $77,064 |
| GradCo LLC |
5 | $117,229 |
| Georgia Dept. of Natural Resources - Environmental Protection Div. |
5 | $70,470 |
| Georgia Institute of Technology |
5 | $89,544 |
| Parsons Transportation Group Inc. |
5 | $140,000 |
| Alliance for Sustainable Energy, LLC |
5 | $92,768 |
| Sci-Tek Consultants, Inc. |
4 | $124,821 |
| MS&K, Inc. |
4 | $69,000 |