| Position holders | |||
|---|---|---|---|
| Holder | Start date | End date | |
| John E. Sparks Politician | - | - | |
| Scott W. Stucky Politician | - | - | |
| James E. Baker Politician | - | - | |
| Eugene R. Sullivan Politician | - | - | |
| Andrew S. Effron Politician | - | - | |
| Gregory E. Maggs Politician | - | - | |
| Charles E. Erdmann Politician | - | - | |
| Walter T. Cox III Politician | - | - | |
| Kevin A. Ohlson Politician | - | - | |
| Susan J. Crawford Politician | - | - | |
| Margaret A. Ryan Politician | - | - | |