| Company | Location | Certifications | License # |
|---|---|---|---|
| Aaron Jay York | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0006116 |
| Adam Chandler Fuller | — | Installer (Class I) | OS0040294 |
| Allan R Mcfarland | — | Installer (Class II)Inspector (Maintenance Provider) | OS0005655 |
| Allen L Lassetter | — | Installer (Class II)Inspector (Maintenance Provider) | OS0025720 |
| Andrew J Jenkins | — | Installer (Class II) | OS0037412 |
| Andrew William Smith | — | Installer (Class I) | OS0036619 |
| Angelea Gayle Woodard | — | Inspector (Maintenance Provider) | MP0001431 |
| Austin Cordell Blackmon | — | Installer (Class I) | OS0040656 |
| Ayden Lane | — | Installer (Class I) | OS0039827 |
| Barry L Hand | — | Installer (Class II) | OS0001230 |
| Benjamin Robert Moberg | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0006918 |
| Billy Dean Blount | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0005301 |
| Blain E Brookshire | — | Installer (Class II) | OS0004980 |
| Bobby Dale Blackburn | — | Installer (Class I) | OS0040580 |
| Bradley Harrison | — | Installer (Class II)Designer (Site Evaluator) | OS0036556 |
| Brandon Mcqueen | — | Designer (Site Evaluator) | OS0039134 |
| Brent A Lassetter | — | Installer (Class II)Inspector (Maintenance Provider) | OS0034238 |
| Case Edward Dherde | — | Installer (Class I) | OS0041501 |
| Charles Harry Gulebian | — | Designer (Site Evaluator) | OS0010303 |
| Cody Kirkland | — | Installer (Class I) | OS0040644 |
| Curtis R Patterson | — | Installer (Class I) | OS0040529 |
| Dan Kieran | — | Installer (Class II)Inspector (Maintenance Provider) | OS0034558 |
| David Bert Fisk | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0001219 |
| Dawn M Kieran | — | Installer (Class I)Inspector (Maintenance Provider) | OS0033724 |
| Derek M Kennan | — | Installer (Class II) | OS0037411 |
| Edwin D Jr Blackburn | — | Installer (Class I) | OS0040634 |
| Ephraim Glueck | — | Installer (Class II)Designer (Site Evaluator) | OS0038464 |
| Jade Wayne Mayhue | — | Installer (Class II) | OS0036917 |
| James Aldridge | — | Installer (Class I) | OS0040915 |
| Jaryn Alexander Ridge | — | Inspector (Maintenance Provider) | MP0002695 |
| Jason L Colliver | — | Inspector (Maintenance Provider) | MP0002305 |
| Jay Holland | — | Installer (Class I) | OS0041183 |
| Jerome M Mendias | — | Installer (Class II)Designer (Site Evaluator) | OS0028096 |
| Jerry M Compton | — | Installer (Class II)Inspector (Maintenance Provider) | OS0004986 |
| Joe D Hutchings | — | Installer (Class II) | OS0028449 |
| John D Portman | — | Installer (Class II)Designer (Site Evaluator) | OS0035907 |
| John Weldon Carpenter | — | Installer (Class I) | OS0038532 |
| Jon Hayse | — | Installer (Class II)Inspector (Maintenance Provider) | OS0041078 |
| Jonathan Chase Sullivan | — | Installer (Class I) | OS0037949 |
| Kash Hines | — | Installer (Class I) | OS0034284 |
| Kenneth B Jr Willis | — | Installer (Class I) | OS0028194 |
| Kenneth B Willis | — | Installer (Class II)Inspector (Maintenance Provider) | OS0022294 |
| Kenneth G Bellringer | — | Installer (Class I) | OS0040045 |
| Larry D Garrett | — | Installer (Class II)Inspector (Maintenance Provider) | OS0005477 |
| Lucas A Snyder | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0019904 |
| Micah Findley | — | Installer (Class I) | OS0041309 |
| Michael W Pe Jones | — | Designer (Site Evaluator) | OS0009373 |
| Nealy Wayne Woodard | — | Installer (Class II)Inspector (Maintenance Provider) | OS0006074 |
| Olenn G Morrison | — | Installer (Class II) | OS0006121 |
| Poet Evans Colliver | — | Inspector (Maintenance Provider) | MP0002766 |
| Raymond J Filer | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0007717 |
| Remington Regian | — | Installer (Class I) | OS0040750 |
| Ricky D Paul | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0029302 |
| Robert Neal Akins | — | Installer (Class I) | OS0039683 |
| Ronald D Regian | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0018655 |
| Taylor Blackburn | — | Installer (Class I) | OS0040579 |
| Trent William Jennings | — | Installer (Class I) | OS0040489 |
| Vickie L Glatter | — | Installer (Class II)Inspector (Maintenance Provider) | OS0029306 |
| Winston Riley Hayes | — | Installer (Class I) | OS0041489 |
59 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Mclennan County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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