| Business | Phone |
| B & T Engineering Inc 1619 E 36th Pl, Tulsa 74105 | (918) 747-4630 |
| B & T Engineering Inc 601 S Boulder Ave # 703, Tulsa 74119 | (918) 587-4630 |
| Cobb Engineering 4530 S Sheridan Rd, Tulsa 74145 | (918) 663-9401 |
| Engineering Group Design 4608 S Garnett Rd, Tulsa 74146 | (918) 628-7100 |
| Flynt & Kallenberger Engineers 8147 E 63rd Pl, Tulsa 74133 | (918) 252-9651 |
| Gastech Engineering Corp 5614 E 114th St, Tulsa 74137 | (918) 663-8383 |
| Kentube Engineering Products 186 N Lansing Ave, Tulsa 74120 | (918) 301-8000 |
| Myers Engineering 6218 S Lewis Ave # 116, Tulsa 74136 | (918) 388-2197 |
| Natural Gas Process Systems 7854 E 79th St, Tulsa 74133 | (918) 252-1305 |
| Onsite Stress Relieving Svc 10838 E Newton St # 117, Tulsa 74116 | (918) 234-1222 |
| Paradigm Construction Inc Po Box 700239, Tulsa 74170 | (918) 227-3877 |
| Poe Enterprises 1924 S Utica Ave # 700, Tulsa 74104 | (918) 749-6873 |
| Power & Control Engr Solutions 4823 S Sheridan Rd, Tulsa 74145 | (918) 627-7237 |
| Ppi Engineering Tulsa 74137 | (918) 493-5741 |
| Precision Engineering Group 1560 E 21st St # 202, Tulsa 74114 | (918) 749-3000 |
| Sbj Engineers Inc Tulsa 74136 | (918) 494-3675 |