2018-Present: Dr. David DeVries (Regional Director, Western Region)
1989-2018: G. Michael Livingston
1977-1989: Donald M Taylor
1973-1977: Joseph H Kimbel
1956-1973: Roy Ramseyer
1952-1956: Tillman Habegger
1944-1952: Edison Habegger
1940-1944: DF Siemens
1929-1930: SD Burkey
1928-1929: Joseph Greider
1927-1928: SD Burkey
1926-1927: GJ Kliewer
1924-1926: John E Lauby
1919-1924: SD Burkey