Registered onsite wastewater professionals in Callaway County, Missouri
20 people on Missouri’s roster of individually registered onsite wastewater professionals give Callaway County as their address. A registered professional is someone who holds a Missouri onsite wastewater registration personally.
| Name | Licence | City | Expires |
|---|---|---|---|
| Aaron Hackmann | Basic InstallerNo. 37373 | Chamois | April 30, 2027 |
| Andrew Meyerott | Advanced InstallerNo. 38368 | St. Charles | May 31, 2028 |
| Austin Tipton | Basic InstallerNo. 38578 | Columbia | January 31, 2026 |
| Brandon Binkley | Advanced InstallerNo. 34313 | Jefferson City | March 31, 2026 |
| Brandon Willis | Advanced InstallerNo. 37022 | Barnett | May 31, 2028 |
| Brent Wolken | Advanced InstallerNo. 38783 | Westphalia | May 31, 2026 |
| Charles Harwood | Onsite Soil EvaluatorNo. 10022 | St. Louis | March 31, 2026 |
| Donald Gilbert | Basic InstallerNo. 35894 | Montgomery Ctiy | January 31, 2027 |
| Douglas Briot | Advanced InstallerNo. 31248 | Henley | August 31, 2026 |
| Greg Edelen | Advanced InstallerNo. 32357 | Foristell | July 31, 2026 |
| Greg Post | Advanced InstallerNo. 35165 | Ashland | October 31, 2026 |
| Gregory Wickam | Advanced InstallerNo. 37914 | Eldon | August 31, 2027 |
| Jody Schmidt | Advanced InstallerNo. 31768 | New Melle | January 31, 2026 |
| Jonathan Fleer | Basic InstallerNo. 39449 | Hermann | July 31, 2028 |
| Keith Strausser | Advanced InstallerNo. 37656 | Columbia | October 31, 2025 |
| Mario Trevino | Onsite Soil EvaluatorNo. 50054 | New Bloomfield | March 31, 2026 |
| Michael Kelly | Advanced InstallerNo. 39038 | Saint Louis | December 31, 2026 |
| Michael Wells | Basic InstallerNo. 37584 | Saint Charles | May 31, 2028 |
| Patrick Groose | Advanced InstallerNo. 31647 | Eugene | November 30, 2025 |
| Perry Stewart | Onsite Soil EvaluatorNo. 50752 | Williamsburg | March 31, 2026 |
What “Registered onsite wastewater professional” means in Missouri
Being on this roster means Missouri DHSS has licensed this person for holds a Missouri onsite wastewater registration personally. It is not a rating, a review, or a statement about price, insurance or workmanship.
Registrations carry an expiration date, shown on every listing. The state republishes the dataset as registrations change.
Before you hire, confirm the licence with Missouri DHSS, or the state's own published registration data. How to verify →
Registered onsite wastewater professionals in neighbouring counties
Records as published August 26, 2026. Report a correction.