| Company | Location | Certifications | License # |
|---|---|---|---|
| Alfonso Arreola | — | Installer (Class II)Designer (Site Evaluator) | OS0039912 |
| Alfred Figueroa | — | Installer (Class I) | OS0041566 |
| Austin James Boyett | — | Installer (Class II) | OS0007222 |
| Authur D Jr Griffin | — | Installer (Class II) | OS0029668 |
| Benjamin Davis | — | Installer (Class I) | OS0040099 |
| Bud Yancy Morgan | — | Installer (Class I) | OS0035969 |
| Cameron Abicht | — | Installer (Class I) | OS0039666 |
| Casey J Ramirez | — | Installer (Class I) | OS0040373 |
| Charles Bruner | — | Installer (Class I) | OS0039350 |
| Charles Lance Lackey | — | Installer (Class I) | OS0039628 |
| Charlie W Jr Graham | — | Installer (Class II) | OS0031090 |
| Cody J Biggs | — | Installer (Class I)Designer (Site Evaluator) | OS0034363 |
| Cory Blake Larue | — | Installer (Class I) | OS0041263 |
| Coy Dale Dowthitt | — | Installer (Class I) | OS0036020 |
| Cy Michael Luschen | — | Installer (Class II) | OS0040658 |
| Dale Ralph Gosnell | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0006982 |
| Daman Ford | — | Installer (Class II) | OS0038232 |
| Dave A Berry | — | Inspector (Maintenance Provider) | MP0000643 |
| David D Scott | — | Installer (Class II) | OS0027928 |
| David W Rogers | — | Installer (Class I) | OS0009106 |
| Dennis C Ledford | — | Installer (Class II)Inspector (Maintenance Provider) | OS0021962 |
| Dennis L Barber | — | Installer (Class II)Inspector (Maintenance Provider) | OS0027268 |
| Dennis Lambert | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0037972 |
| Donald Strait | — | Installer (Class II) | OS0037844 |
| Edgar Hill | — | Designer (Site Evaluator) | OS0038824 |
| Felton K Stone | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0026872 |
| Francis X Phillips | — | Installer (Class II)Inspector (Maintenance Provider) | OS0004760 |
| Gary M Reeder | — | Installer (Class II) | OS0000496 |
| Gilberto Herrera | — | Installer (Class II) | OS0038217 |
| Greg Lee Gardner | — | Installer (Class II)Inspector (Maintenance Provider) | OS0038719 |
| Jacob P Adams | — | Inspector (Maintenance Provider) | MP0002121 |
| James Bryan Garrett | — | Installer (Class II)Inspector (Maintenance Provider) | OS0005859 |
| James C Ii Gerow | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0035107 |
| Jarrett Lee Clark | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0040013 |
| Jason Mccullough | — | Installer (Class I) | OS0040318 |
| Jason Todd Sager | — | Installer (Class II)Inspector (Maintenance Provider) | OS0008745 |
| Jayden Disiere | — | Installer (Class I) | OS0041276 |
| Jerett J Broten | — | Installer (Class II) | OS0034185 |
| Jimmy D Jr Carr | — | Installer (Class II) | OS0040380 |
| Joe W Stout | — | Designer (Site Evaluator) | OS0009909 |
| John Bruce Soulis | — | Installer (Class I) | OS0039622 |
| John Eric Griffin | — | Designer (Site Evaluator) | OS0035088 |
| John J Myers | — | Installer (Class II) | OS0033370 |
| John Lewis | — | Installer (Class II)Inspector (Maintenance Provider) | OS0039366 |
| John Wayne Lopez | — | Installer (Class I) | OS0041275 |
| Jonathan W Womack | — | Installer (Class II) | OS0037559 |
| Joshua Lee Loper | — | Installer (Class I)Inspector (Maintenance Provider) | OS0033327 |
| Justin Mathew Mauney | — | Designer (Site Evaluator) | OS0040230 |
| Kenneth L Sr Fillpot | — | Installer (Class II)Designer (Site Evaluator) | OS0005338 |
| Leonard F Jr Sanmann | — | Designer (Site Evaluator) | OS0033852 |
| Mark Ryan Yost | — | Installer (Class I) | OS0038141 |
| Mark W Averitte | — | Installer (Class II) | OS0005244 |
| Mary R Taylor | — | Designer (Site Evaluator) | OS0038016 |
| Matthew Myers | — | Installer (Class II) | OS0008493 |
| Michael Hilburn | — | Installer (Class II)Inspector (Maintenance Provider) | OS0039615 |
| Nicholas Robert Castillion | — | Installer (Class I) | OS0041158 |
| Nicolas Gabriel Lopez | — | Installer (Class II) | OS0037871 |
| Randy Vasquez | — | Installer (Class I) | OS0038301 |
| Richard A Boyett | — | Inspector (Maintenance Provider) | MP0001759 |
| Richard C Feder | — | Installer (Class I) | OS0040088 |
| Robert New | — | Installer (Class I) | OS0040080 |
| Rod V Rs White | — | Designer (Site Evaluator) | OS0010210 |
| Rodney W Sr Wells | — | Installer (Class II)Inspector (Maintenance Provider) | OS0021350 |
| Ronald K Clifton | — | Inspector (Maintenance Provider) | MP0000640 |
| Ronnie D Lunsford | — | Installer (Class II) | OS0004593 |
| Ryan Hukill | — | Installer (Class II)Designer (Site Evaluator) | OS0038121 |
| Samuel D Kaiser | — | Installer (Class II) | OS0035165 |
| Sergio F Munoz | — | Installer (Class II)Inspector (Maintenance Provider) | OS0036294 |
| Suzanne Marie Eldridge | — | Installer (Class I) | OS0041119 |
| Tanya C Mitchell | — | Designer (Site Evaluator) | OS0028782 |
| Thomas L Sr Holmes | — | Installer (Class II) | OS0025151 |
| Todd A Chandler | — | Installer (Class II) | OS0028620 |
| Tommy L Jr Holmes | — | Installer (Class II)Inspector (Maintenance Provider) | OS0025236 |
73 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Parker County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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