View the O'Fallon Police Department Organizational Chart (PDF). To contact an employee not listed, please call 636-240-3200.
| Chief | Frank Mininni | fmininni@ofallonmo.gov | 636-240-3200 |
| Major | Derek Myers | dmyers@ofallonmo.gov | 636-379-5632 |
| Captain, Operations | Pat Hossenlopp | phossenlopp@ofallonmo.gov | 636-379-5632 |
| Captain, Support Services | Mat Wolf | mwolf@ofallonmo.gov | 636-379-5675 |
| Training & Compliance Sergeant | Keith Lewis | klewis@ofallonmo.gov | 636-379-1645 |
| Public Information Sergeant | Bryan Harr | bharr@ofallonmo.gov | 636-379-1645 |
Civilian Staff
| Office Manager | Laura | 636-379-5651 |
| Evidence | Elizabeth | 636-379-5642 |
| Records Supervisor | Jamie | 636-379-5643 |
| Training Coordinator | Kara | 636-379-5657 |