| Number | Begin | End | Name |
| 39 | August 2025 | | Brady J. Armstrong |
| 38 | May 2025 | August 2025 | Jason VonHummel |
| 37 | May 2024 | May 2025 | Maxwell A. Plotkin |
| 36 | May 2023 | May 2024 | Bryce J. Yeager |
| 35 | May 2022 | May 2023 | Logan A. Mader |
| 34 | May 2021 | May 2022 | Johnny A. Kehoe |
| 33 | April 2020 | May 2021 | Kyle V. Bennett |
| 32 | December 2019 | April 2020 | Shane C. Kulikowski |
| 31 | April 2019 | December 2019 | Drew A. Santoro |
| 30 | May 2018 | April 2019 | James A. Marsh |
| 29 | May 2017 | May 2018 | Sonny J. Rey |
| 28 | March 2017 | May 2017 | Roberto E. Soto-Martinez |
| 27 | May 2016 | March 2017 | Austin J. Golden |
| 26 | April 2015 | May 2016 | Wesley W. Rattansingh |
| 25 | April 2014 | April 2015 | Corey C. Sjogren |
| 24 | April 2013 | April 2014 | Nicholas D. Kuzmiak |
| 23 | August 2011 | May 2011 | Alex M. Newsome |
| 22 | May 2011 | April 2013 | Arty Kambo |
| 21 | September 2010 | August 2011 | Drew R. High |
| 20 | April 2009 | September 2010 | Constantine Dimitri Pahides |
| 19 | May 2008 | April 2009 | Anthony C. Gentile |
| 18 | April 2007 | May 2008 | Timothy Hartung |
| 17 | May 2006 | April 2007 | Benjamin Simmons |
| 16 | May 2005 | May 2006 | Sean P. Brennan |
| 15 | June 2004 | May 2005 | Chris Engart |
| 14 | January 2000 | August 2000 | Marcus Labuda |
| 13 | July 1999 | January 2000 | Steven F. Jara |
| 12 | February 1998 | July 1999 | James F. Dezzi |
| 11 | January 1997 | February 1998 | Brian J. Eisworth |
| 10 | February 1995 | April 1995 | Kent A. Raffensberger |
| 9 | December 1993 | December 1994 | Jon E. Groller |
| 8 | May 1993 | December 1993 | Jamie B. Kemm |
| 7 | February 1991 | | Michael C. Jemo |
| 6 | January 1988 | December 1988 | Mark L. Beaudoin |
| 5 | January 1987 | December 1987 | Stanley E. Haines, Jr. |
| 4 | January 1981 | December 1981 | Randy B. Spence |
| 3 | January 1978 | December 1979 | Gregory S. Rodgers |
| 1 | | | Tom M. McCarty |
| 2 | | | Tom M. McCarty |