| Business | Phone |
| Bkm Group 9400 Broadway Ext # 605, Oklahoma City 73114 | (405) 478-9555 |
| Ch2m Hill 25 S Oklahoma Ave # 200, Oklahoma City 73104 | (405) 290-7366 |
| Dank Consulting 2519 Nw 23rd St # 101, Oklahoma City 73107 | (405) 947-5510 |
| Fesler Technical Svc Po Box 721622, Oklahoma City 73172 | (405) 745-3181 |
| Knowledge Based Systems Inc 2912 S Douglas Blvd, Oklahoma City 73130 | (405) 741-9090 |
| M E31 Consulting Engineers 4724 N Meridian Ave, Oklahoma City 73112 | (405) 942-7066 |
| Macrolennium Llc 4801 N Classen Blvd # 108, Oklahoma City 73118 | (405) 418-0391 |
| Mkec Engineering Consultant 1000 W Wilshire Blvd, Oklahoma City 73116 | (405) 842-8558 |