Jon Guynes, a former assistant coach at Holy Cross, completed his first year as the assistant defensive line coach and recruiting coordinator for the Rams in 2017.

In 2017, Guynes was part of a Fordham defense that ranked third in the Patriot League in turnover margin (0.18) and had three players earn All-Patriot League honors, including freshman linebacker Glenn Cunningham, who received Freshman All-America accolades.

Guynes also helped sign eleven recruits during the December 2017 signing period, including a 247Sports three-star offensive lineman.
 
Guynes completed his second season with Holy Cross in 2016 where he served as the running backs coach.
 
Prior to his two years in Worcester, Guynes spent one season (2014) as the running backs coach at Colby College in Waterville, Maine.
 
Previously, Guynes was a graduate assistant coach at the University of Connecticut in 2012 and 2013, assisting with the defensive line. In addition, he was the defensive line coach at Assumption College in 2011.
 
During the 2008 campaign, Guynes served as Holy Cross’ outside linebackers coach, helping lead the Crusaders to an overall record of 7-4 and a second place finish in the Patriot League.
 
From 2006-2007, Guynes was the linebackers coach at Iona College, where he helped lead the team to a 7-4 record in 2007. During his time at Iona, Guynes guided the career of Adam Lipski, who earned second team Mid-Major All-America honors in both 2006 and 2007, and was named the 2007 MAAC Defensive Player of the Year. Prior to his time at Iona, Guynes served as the defensive backs coach at Muhlenberg College in 2005.
 
A 2005 graduate of Lehigh University, Guynes was a three-year starter at linebacker for the Mountain Hawks. He helped lead Lehigh to an overall record of 36-11 during his four seasons, including two trips to the NCAA FCS playoffs. Guynes also received a master’s degree in marketing from Connecticut in 2011.