# Jefferson County, Missouri - Government jobs and careers

> 0 open roles at Jefferson County, Missouri - Government as of October 24, 2026. Source: https://www.thejobsmap.com/company/jefferson-county-missouri-government

Jefferson County was created by "Act of Territory" December 8, 1818. Named in honor of Thomas Jefferson (1743-1826), Jefferson County became a Charter form of Government in November 2008 by the voters. Jefferson County, located in the eastern part of the state, is the sixth most populous county in Missouri.

## Key facts

| | |
|---|---|
| Open roles | 0 |
| Headquarters | Hillsboro, MO, United States |
| Employees | 501 to 1,000 |
| Industries | Government |
| Website | https://jeffcomo.org |

## Leadership

- Dennis Gannon, County Executive
- Ashley Fears, Deputy Director Of Administration
- Trisha Stefanski, Prosecuting Attorney
- Jason Jonas, Public Works Director
- Jalesia F.m. Kuenzel, Jefferson County Counselor

## Common questions

### Is Jefferson County, Missouri - Government hiring right now?

Jefferson County, Missouri - Government has no open roles listed as of October 24, 2026. Roles appear here as soon as they are posted on Jefferson County, Missouri - Government's careers site.

### Where is Jefferson County, Missouri - Government headquartered?

Jefferson County, Missouri - Government is headquartered in Hillsboro, MO, United States.

### Who leads Jefferson County, Missouri - Government?

Dennis Gannon, County Executive, is at the top of Jefferson County, Missouri - Government's org chart.

### How do I apply for a job at Jefferson County, Missouri - Government?

Pick a role on Jefferson County, Missouri - Government's TheJobsMap page and select Apply. Every listing links to the original posting on Jefferson County, Missouri - Government's own careers site, so you apply directly with the employer.