| Business | Phone |
| Brown Technical Consulting Inc 3826 E 103rd St, Tulsa 74137 | (918) 299-8651 |
| Ch2m Hill 502 S Main St # 4, Tulsa 74103 | (918) 583-3057 |
| Cyntergy Services Llc 320 S Boston Ave # 12, Tulsa 74103 | (918) 877-6000 |
| Garver Engineers 10015 E 51st St, Tulsa 74146 | (918) 250-5922 |
| Warren W Smith & Assoc 4817 E 34th St, Tulsa 74135 | (918) 742-3385 |
| Urs Corp 1437 S Boulder Ave # 660, Tulsa 74119 | (918) 582-2552 |
| Municipal Consulting Agency 5425 S Lakewood Pl, Tulsa 74135 | (918) 664-1889 |
| Parsons Infrastructure & Tech 324 S Main St # 800, Tulsa 74103 | (918) 587-7049 |
| Petro-Chem Development Co 8310 E 73rd St, Tulsa 74133 | (918) 254-8000 |
| Power & Control Engr Slltns 100 S 109th East Pl, Tulsa 74128 | (918) 627-7237 |
| Standard Testing & Eng Co 5358 S 125th East Ave # B, Tulsa 74146 | (918) 459-2700 |