| Business | Phone |
| Subsurface Computer Modeling 3103 Bee Caves Rd 133, Austin 78746 | (512) 329-5285 |
| Robert S Kier Consulting 4900 Spicewood Springs Rd, Austin 78759 | (512) 343-7133 |
| Geos Consulting 7205 Towering Oaks Dr, Austin 78745 | (512) 445-3433 |
| Charles Woodruff Consulting 711 W 14th St, Austin 78701 | (512) 480-0335 |
| Christopher Caran Consulting 3202 Spaniel Dr, Austin 78759 | (512) 836-0510 |
| Burg Geo-Consulting Inc 9705 Eagle Rising Cv, Austin 78730 | (512) 527-9442 |
| Telegraph Explorations 3405 Glenview Ave, Austin 78703 | (512) 451-8778 |
| Geocosm 3311 San Mateo Dr, Austin 78738 | (512) 331-0363 |
| Petroleum Geologist 1200 Lakeway Dr 12d, Austin 78734 | (512) 261-5756 |
| R D Stallings 11205 Ranch Road 620 N, Austin 78726 | (512) 331-6996 |