| Company | Location | Certifications | License # |
|---|---|---|---|
| Aidan Michael Shearin | — | Installer (Class II) | OS0041043 |
| Christopher Quirt Brantner | — | Installer (Class II) | OS0037757 |
| Christopher S Weaver | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0037417 |
| Clayton D Ranton | — | Installer (Class II) | OS0019897 |
| Doyle B Jr Reed | — | Installer (Class I) | OS0033143 |
| James Carlisle | — | Installer (Class I) | OS0038765 |
| James E Bumpurs | — | Inspector (Maintenance Provider) | MP0000423 |
| Jerry A Allen | — | Installer (Class II)Inspector (Maintenance Provider) | OS0003833 |
| John G Long | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0034520 |
| Justin B Ruffeno | — | Installer (Class II)Inspector (Maintenance Provider) | OS0039630 |
| Kyle Daniel Jr Workman | — | Installer (Class I) | OS0039105 |
| Michael E Vezorak | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0031450 |
| Michael Thomas Marcantel | — | Installer (Class I) | OS0031210 |
| Sam W Bradshaw | — | Installer (Class II)Inspector (Maintenance Provider) | OS0023258 |
| Troy E Hutchison | — | Installer (Class I) | OS0021966 |
| Tyron B Scott | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0032640 |
| Zack L Shriver | — | Installer (Class II)Inspector (Maintenance Provider) | OS0027374 |
17 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Leon County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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