| Number | Begin | End | Name |
| 50 | January 2024 | | Dylan A. Kepley |
| 49 | November 2022 | January 2024 | Dylan M. Anderson |
| 48 | December 2021 | November 2022 | Ethan R. Newell |
| 47 | December 2020 | December 2021 | Jack K. Riley |
| 46 | December 2019 | December 2020 | Mason G. Ohnemus |
| 45 | May 2019 | December 2019 | Kyler M. Estenson |
| 44 | December 2018 | May 2019 | Samuel D. Jorgensen |
| 43 | December 2017 | December 2018 | Zach R. Woodbeck |
| 42 | December 2016 | December 2017 | Tom Scallon |
| 41 | December 2015 | December 2016 | Riley S. McCloskey |
| 40 | December 2014 | December 2015 | Brandon J. Landowski |
| 39 | January 2014 | December 2014 | Jonathan Dimitriou |
| 38 | January 2013 | January 2014 | Caleb Prohaska |
| 37 | January 2012 | January 2013 | Eric S. Grinde |
| 36 | January 2011 | January 2012 | Joe M. Lockard-Nobile |
| 35 | October 2010 | January 2011 | Alex Neumann |
| 34 | December 2009 | October 2010 | Steven D. Holmstrom |
| 33 | December 2008 | December 2009 | Michael G. Beals |
| 32 | February 2008 | December 2008 | Christopher F. Yockey |
| 31 | August 2007 | February 2008 | Renoj Jacob |
| 30 | December 2006 | August 2007 | Michael P. Gilbert |
| 29 | May 2006 | December 2006 | Tom Rush |
| 28 | December 2005 | May 2006 | Matt Kronlage |
| 27 | December 2004 | December 2005 | Alexander Zikra |
| 26 | May 2004 | December 2004 | Jeffrey Engh |
| 25 | February 2003 | May 2004 | Scott A. Hemesath |
| 24 | January 2002 | February 2003 | Garrett D. Burchett |
| 23 | December 2000 | January 2002 | Kyle R. Mayberry |
| 22 | March 2000 | December 2000 | Andrew T. Klein |
| 21 | March 1999 | March 2000 | Eric R. Bidwell |
| 20 | March 1998 | March 1999 | James E. Bucher |
| 19 | January 1997 | March 1998 | Eric D. Padget |
| 18 | March 1996 | January 1997 | Jeffrey L. Kucera |
| 17 | January 1995 | March 1996 | Ryan P. Burchett |
| 16 | April 1994 | January 1995 | Thomas M. Stimson |
| 15 | November 1992 | November 1993 | Mark E. Reisinger |
| 14 | December 1991 | | Vernon R. Hanssen |
| 13 | January 1991 | December 1991 | Curtis B. Schrieber |
| 12 | January 1981 | December 1981 | Jeffrey T. Chindlund |
| 11 | January 1975 | December 1976 | Brooke J. Billick |
| 10 | January 1972 | December 1973 | Philip L. Kaser |
| 9 | January 1966 | December 1966 | Steven F. Mores |
| 8 | January 1962 | December 1962 | William C. Roe |
| 7 | January 1952 | December 1952 | Duane E. Thompson |
| 6 | January 1951 | December 1952 | Hugh E. Thomson |
| 5 | January 1950 | December 1951 | Mr. Hovey H. Brom |
| 1 | | | William C. Roe |
| 2 | | | William C. Tobin |
| 3 | | | Patrick R. Dugan |
| 4 | | | Prof. Emer. George Burnet Jr., Ph.D. |