| Business | Phone |
| Air Engineering Inc 4339 N Santa Fe Ave, Oklahoma City 73118 | (405) 528-7591 |
| Carroll Engineering Inc 11654 Shasta Ln, Oklahoma City 73162 | (405) 720-2421 |
| Computational Engineering 8413 Nw 66th St, Oklahoma City 73132 | (405) 720-1140 |
| Engatech Engineering 13921 Quail Point Dr, Oklahoma City 73134 | (405) 749-8324 |
| Engineering Solutions Llc 6801 Broadway Ext, Oklahoma City 73116 | (405) 848-4093 |
| Gw2 Engineering Inc 4040 N Stiles Ave, Oklahoma City 73105 | (405) 684-8920 |
| Long Engineering Co 5653 N Pennsylvania Ave, Oklahoma City 73112 | (405) 848-3356 |
| Northrop Grumman Corp 4600 Se 29th St # 380, Oklahoma City 73115 | (405) 670-1917 |
| Obelisk Engineering Inc 226 Ne 2nd St, Oklahoma City 73104 | (405) 290-7676 |
| Pathway Engineering Inc 317 N Portland Ave # D, Oklahoma City 73107 | (405) 948-7246 |
| Peak Sales & Engineering 3908 Nw 17th St, Oklahoma City 73107 | (405) 947-3793 |
| Wiley N Cook & Assoc Inc Engr 9212 N Rockwell Ave, Oklahoma City 73132 | (405) 621-1400 |
| Sturm Engineering Co 1 Nw 64th St, Oklahoma City 73116 | (405) 848-3102 |
| Source Engineering Inc 5801 Philip J Rhoads Ave, Oklahoma City 73122 | (405) 789-8657 |
| Source Engineering Plus 5606 N Rockwell, Oklahoma City 73122 | (405) 787-5735 |
| Shepherd Engineering & Design 4308 N Classen Blvd, Oklahoma City 73118 | (405) 499-5300 |