| WSP USA Inc. | 24 | $92,414 | $84,068 – $125,008 |
| Ut-Battelle, LLC (Oak Ridge National Laboratory) | 5 | $115,000 | $84,848 – $119,255 |
| Rivus Consulting LLC | 4 | $87,464 | $85,878 – $87,464 |
| Jacobs Engineering Group Inc. | 4 | $99,098 | $92,706 – $103,894 |
| Sci-Tek Consultants, Inc. | 3 | $124,821 | $124,821 – $124,821 |
| Zest LLC | 3 | $79,040 | $78,000 – $85,072 |
| HDR Engineering, Inc. | 2 | $102,814 | $102,814 – $102,814 |
| HDR Engineering, Inc. of the Carolinas | 2 | $105,955 | $105,955 – $105,955 |
| ATCS, Inc. | 2 | $85,000 | $85,000 – $85,000 |
| Stantec Consulting Services Inc. | 2 | $103,428 | $97,942 – $108,914 |
| Lawson-Fisher Associates P.C. | 1 | $86,340 | $86,340 – $86,340 |
| Christopher B. Burke Engineering, Ltd. | 1 | $68,931 | $68,931 – $68,931 |
| Civil & Environmental Consultants, Inc. | 1 | $66,500 | $66,500 – $66,500 |
| Aig Technical Services, LLC | 1 | $104,000 | $104,000 – $104,000 |
| Berkshire Hathaway Specialty Insurance Company | 1 | $103,000 | $103,000 – $103,000 |
| Premier Engineering Solutions LLC | 1 | $68,640 | $68,640 – $68,640 |
| MS Consultants, Inc. | 1 | $76,502 | $76,502 – $76,502 |
| Resolution Group, Inc. | 1 | $65,000 | $65,000 – $65,000 |
| Osborn Engineering | 1 | $65,000 | $65,000 – $65,000 |
| Paradigm Environmental, Inc. | 1 | $98,900 | $98,900 – $98,900 |
| Stoeppelwerth & Associates, Inc. | 1 | $69,992 | $69,992 – $69,992 |
| Ulteig Engineers, Inc. | 1 | $92,498 | $92,498 – $92,498 |
| STV Incorporated | 1 | $108,347 | $108,347 – $108,347 |
| Wood Rodgers, Inc. | 1 | $101,878 | $101,878 – $101,878 |
| Wade Trim, Inc. | 1 | $60,320 | $60,320 – $60,320 |