| Business | Phone |
| Williams Creek Consulting 330 W Spring St # 440, Columbus 43215 | (614) 224-4473 |
| Wlt Consulting 224 Glenhurst Ct, Columbus 43230 | (614) 476-9567 |
| Acro Service Corp 2720 Airport Dr, Columbus 43219 | (614) 418-1764 |
| Advanced Computational Svc 750 Cross Pointe Rd, Columbus 43230 | (614) 861-7015 |
| American Consulting Corporated 2550 Corp Exchange Dr # 300, Columbus 43231 | (614) 901-2235 |
| Varo Engineers 2233 N Bank Dr, Columbus 43220 | (614) 459-0424 |
| Bbs Corp 1103 Schrock Rd # 400, Columbus 43229 | (614) 888-3100 |
| Benatec Associates 119 Dillmont Dr # 200, Columbus 43235 | (614) 431-1116 |
| Think Big Consulting 173 E 14th Ave, Columbus 43201 | (614) 487-0371 |
| Black & Veatch 1335 Dublin Rd, Columbus 43215 | (614) 481-3514 |
| Brown & Caldwell 2674 Federated Blvd, Columbus 43235 | (614) 410-6144 |
| Site-Blauvelt Engineers Inc 1377 Dublin Rd, Columbus 43215 | (614) 485-7483 |
| Camp Dresser & Mc Kee Inc 8800 Lyra Dr # 500, Columbus 43240 | (614) 847-8340 |
| Carter & Burgess Inc 180 E Broad St, Columbus 43215 | (614) 221-7300 |
| Coatings Technology Consulting 115 S Virginialee Rd, Columbus 43209 | (614) 338-0738 |
| Resource Fuels 17 S High St # 1220, Columbus 43215 | (614) 233-6350 |
| Covarrubias Enterprises 5305 Acevedo Ct, Columbus 43235 | (614) 457-2288 |
| Owen Engineering/Mgmt Consultants 1565 S High St, Columbus 43207 | (614) 444-6753 |
| P S Engineering Consulting 5687 Brinkley Ct # A, Columbus 43235 | (614) 240-2705 |
| Parsons Transportation Group 1 E Campus View Blvd # 230, Columbus 43235 | (614) 543-7030 |
| Eco Nomics 2351 Kensington Dr, Columbus 43221 | (614) 488-1826 |
| Entrepreneur's Source 1848 Wetherburn Dr, Columbus 43235 | (614) 792-1492 |
| Foghorn Consulting 2332 Bryden Rd, Columbus 43209 | (614) 231-9511 |
| Metcalf & Eddy Inc 2800 Corporate Exchange Dr, Columbus 43231 | (614) 890-5501 |
| Hockaden & Assoc Inc 883 N Cassady Ave, Columbus 43219 | (614) 252-0993 |
| Korda Nemeth Engineering Inc 1650 Watermark Dr # 200, Columbus 43215 | (614) 487-1650 |
| Imaginit Technologies 4889 Sinclair Rd # 101, Columbus 43229 | (614) 410-1760 |
| Integral Solutions 8108 N High St, Columbus 43235 | (614) 888-4684 |
| J T Krisnick Ltd 5482 Glasgow Pl, Columbus 43235 | (614) 457-4765 |
| Jpc Engineering 1321 Broadview Ave, Columbus 43212 | (614) 487-1239 |
| Keaney & Co 1314 Oakview Dr, Columbus 43235 | (614) 846-9923 |
| Jacobs Civil Inc 1600 Watermark Dr # 100, Columbus 43215 | (614) 488-4828 |
| Jerry Hammond & Assoc 137 E State St, Columbus 43215 | (614) 621-3222 |