Samuel B. Thomsen* Jun. 1987 Jul. 1990
1 William Bodde, Jr. Aug. 1990 Jun. 1992
2 David C. Fields Aug. 1992 May. 1995
3 Joan M. Plaisted Feb. 1996 Jul. 2000
4 Michael J. Senko Jan. 2001 Aug. 2003
5 Greta N. Morris Aug. 2003 Dec. 2006
6 Clyde Bishop Dec. 2006 Apr. 2009
7 Martha Campbell Aug. 2009 August 2012
8 Thomas H. Armbruster August 2012 Present

* representative