| Business | Phone |
| Acarus Group Inc 100 N Broadway Ave, Oklahoma City 73102 | (405) 239-2226 |
| Arbor Engineering Svc 200 N Harvey Ave # 1602, Oklahoma City 73102 | (405) 232-3044 |
| Dave Holke Consulting Inc 200 W Wilshire Blvd, Oklahoma City 73116 | (405) 842-0933 |
| Dave Holke Consulting Inc 3160 W Britton Rd, Oklahoma City 73120 | (405) 843-8773 |
| Davis Engineering Co 623 W California Ave, Oklahoma City 73102 | (405) 232-7770 |
| Earth Hawk Exploration Inc 210 Park Ave # 2100, Oklahoma City 73102 | (405) 236-3030 |
| Escher Corp 2932 Nw 122nd St, Oklahoma City 73120 | (405) 751-2893 |
| F M Buxton Consulting Engineer 6402 N Santa Fe Ave # B, Oklahoma City 73116 | (405) 840-4331 |
| Fifteen Below Ltd 2250 Nw 39th St, Oklahoma City 73112 | (405) 528-4007 |
| Geocomp Data Svc 7124 Melrose Ln, Oklahoma City 73127 | (405) 787-9999 |
| Petro Source Consultants Inc Oklahoma City 73120 | (405) 749-0609 |
| Ram 6301 N Western Ave # 242, Oklahoma City 73118 | (405) 879-0356 |
| William Schopflin Engineering 5801 Broadway Ext, Oklahoma City 73118 | (405) 842-7410 |
| Tyler Energy Llc 3000 United Founders Blvd, Oklahoma City 73112 | (405) 840-4600 |
| Petro Speed Inc 13504 S Tulsa Dr, Oklahoma City 73170 | (405) 691-0199 |
| Southern International Inc 4200 Perimeter Center Dr # 205, Oklahoma City 73112 | (405) 943-5288 |
| Schneider Strata Science 3000 United Founders Blvd #128, Oklahoma City 73112 | (405) 842-1082 |
| Rockford Energy Co 2601 Nw Expressway St # 902e, Oklahoma City 73112 | (405) 848-5100 |