| Company | Location | Certifications | License # |
|---|---|---|---|
| Alfred D Leal | — | Installer (Class II) | OS0039652 |
| Angel A Huerta | — | Installer (Class II)Designer (Site Evaluator) | OS0006490 |
| Billie Bradford | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0035815 |
| Chad W Ashley | — | Installer (Class II) | OS0036203 |
| Cody Wayne Doucet | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0030737 |
| Harold R Stubblefield | — | Installer (Class II)Designer (Site Evaluator) | OS0000730 |
| James B Sefcik | — | Installer (Class II)Designer (Site Evaluator) | OS0000769 |
| James M Blacker | — | Installer (Class II) | OS0040492 |
| Jebb Little Eagle Sifuentes | — | Installer (Class I) | OS0039802 |
| John Kevin Little | — | Designer (Site Evaluator) | OS0039302 |
| Joshua Michael Macias | — | Installer (Class II) | OS0037322 |
| Justin Harvey | — | Installer (Class II) | OS0038790 |
| Justin L Sefcik | — | Installer (Class II)Designer (Site Evaluator) | OS0031357 |
| Landon Wayne Landers | — | Installer (Class II)Designer (Site Evaluator) | OS0034419 |
| Layton S Landers | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0030277 |
| Lonny Scott Ii Landers | — | Installer (Class II)Designer (Site Evaluator) | OS0005891 |
| Margo Connell | — | Installer (Class I) | OS0038120 |
| Melecio H Luna | — | Installer (Class II)Designer (Site Evaluator) | OS0033936 |
| Robert D Pe Hard | — | Installer (Class I) | OS0034090 |
| Robert Raine | — | Installer (Class II) | OS0039430 |
| Robert Ross Sims | — | Installer (Class I) | OS0029044 |
| Thomas Jr Lumbley | — | Installer (Class II)Designer (Site Evaluator) | OS0028964 |
22 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Tom Green County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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