| Business | Phone |
| Data Base Concepts Inc 5118 Bee Cave Rd, Austin 78746 | (512) 329-0664 |
| Towns & Hagemann Inc 1301 Nueces St 102, Austin 78701 | (512) 480-9600 |
| Petroleum Engineer 701 Brazos St, Austin 78701 | (512) 334-6030 |
| Miller Consulting Inc 1000 West Ave, Austin 78701 | (512) 478-3456 |
| Mason Map Svc Inc 814 San Jacinto Blvd, Austin 78701 | (512) 472-7173 |
| Charles E Graham Iii & Assoc 6836 Bee Cave Rd 204, Austin 78746 | (512) 617-6320 |
| Frank Allison & Assoc 3625 Manchaca Rd 102b, Austin 78704 | (512) 443-8384 |
| Trc Consultants 5806 Mesa Dr 215, Austin 78731 | (512) 467-2639 |
| Valco Resource Management Inc 7400 Mesa Dr, Austin 78731 | (512) 502-1007 |
| Laufer 4425 S Mo Pac Expy, Austin 78735 | (512) 899-2414 |
| Randy Fletcher Consulting 8911 Sam Carter Dr, Austin 78736 | (512) 288-2546 |
| Petroleum Recovery Research Po Box 27172, Austin 78755 | (512) 346-7259 |
| Don Rhodes & Assoc 940 E 51st St 108, Austin 78751 | (512) 458-6351 |
| Fbc Technology 13202 Dime Box Trl, Austin 78729 | (512) 335-6290 |