| Business | Phone |
| Frontier Engineering Inc 2701 Liberty Pkwy, Midwest City 73110 | (405) 737-3505 |
| Teledyne Brown Engineering Inc 2701 Liberty Pkwy # E, Midwest City 73110 | (405) 739-0952 |
| Rockwell Collins Inc 5600 Liberty Pkwy # 650, Midwest City 73110 | (405) 733-8001 |