| Company | Location | Certifications | License # |
|---|---|---|---|
| Alfredo Ayala | — | Installer (Class I)Inspector (Maintenance Provider) | OS0039896 |
| Ben Munguia | — | Designer (Site Evaluator) | OS0023667 |
| Brett D Galle | — | Installer (Class II)Designer (Site Evaluator) | OS0024918 |
| Burnie W Galle | — | Installer (Class II) | OS0001075 |
| Colton Norem | — | Installer (Class I) | OS0037098 |
| Daniel Morgan Carr | — | Installer (Class I) | OS0040692 |
| David Craig Weido | — | Installer (Class II) | OS0006207 |
| Garry Nunn | — | Installer (Class II) | OS0036976 |
| John P Pe Gervais | — | Installer (Class I)Designer (Site Evaluator) | OS0036229 |
| Justin D Masson | — | Installer (Class II) | OS0038095 |
| Kenneth W Blezinger | — | Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0022486 |
| Luke M Meinardus | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0033390 |
| Mark A Konvicka | — | Installer (Class II)Inspector (Maintenance Provider) | OS0007928 |
| Matthew J Macha | — | Installer (Class II)Inspector (Maintenance Provider) | OS0033542 |
| Michael Joseph Drab | — | Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0024856 |
| Stephen C Bartels | — | Installer (Class II) | OS0027354 |
| Steven A Pe Wilson | — | Designer (Site Evaluator) | OS0019191 |
| Steven Campos | — | Installer (Class II)Inspector (Maintenance Provider) | OS0039355 |
| Steven D Burttschell | — | Installer (Class II)Inspector (Maintenance Provider) | OS0019884 |
19 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Austin County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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