| Business | Phone |
| Ward Engineering 787 Harrison Dr, Columbus 43204 | (614) 279-7892 |
| Weldqc Inc 1165 Chambers Rd, Columbus 43212 | (614) 487-7207 |
| Amscon Engineering 700 Morse Rd, Columbus 43214 | (614) 985-0012 |
| Barr & Prevost 2800 Corporate Exchange Dr#240, Columbus 43231 | (614) 714-0270 |
| Barr Engineering 5710 Westbourne Ave, Columbus 43213 | (614) 892-0162 |
| Bfd Inc 1275 Kinnear Rd, Columbus 43212 | (614) 487-3689 |
| Technical Associates 830 N Hague Ave, Columbus 43204 | (614) 308-5080 |
| R M Smith & Assoc Inc 7920 Prairieview Dr, Columbus 43235 | (614) 840-9579 |
| R W Armstrong & Assoc Inc 471 E Broad St # 2010, Columbus 43215 | (614) 225-8868 |
| Compiled Designs 803 Caroway Blvd, Columbus 43230 | (614) 475-8306 |
| Concept Engineering 3777 Business Park Dr # B, Columbus 43204 | (614) 279-9000 |
| P E Svc 51 N High St # 3, Columbus 43215 | (614) 221-0772 |
| National Engineering 784 Morrison Rd, Columbus 43230 | (614) 751-9610 |
| Mc Cormick Taylor Inc 445 Hutchinson Ave # 540, Columbus 43235 | (614) 436-1700 |
| Innovative Engineering Group 1415 E Dublin Granville Rd, Columbus 43229 | (614) 888-2535 |
| Institute Of Bioengineering 1974 Braemar Dr, Columbus 43220 | (614) 538-9327 |
| Jenny Engineering Corp 6121 Huntley Rd, Columbus 43229 | (614) 880-1180 |