Kugler was an assistant coach in the NFL for the Detroit Lions (2001–2005), Buffalo Bills (2007–2009), Pittsburgh Steelers (2010–2012), and Denver Broncos (2018).

[4] Kugler signed with the Pittsburgh Steelers as an undrafted free agent in 1989,[2] but after sustaining a concussion in training camp, he was released.

They boasted the sixth-ranked rushing performance in the nation behind Kugler's offensive line led by sophomore Ryan Clady and junior Jeff Cavender, who earned All-WAC honors.

[14][15] In addition to leading the Miners to the New Mexico Bowl in 2014, Kugler’s team achieved a perfect APR academic score of 1,000 and had the highest GPA and graduation rates in school history.

[21] On May 5, 2024, it was revealed the Kugler was hired as the offensive line coach for the DC Defenders of the United Football League (UFL).

[7] Robert and Patrick played on high school football teams that won state championships two straight seasons — in 2009 in New York and 2010 in Pennsylvania.

Robert was named the Class AAAA co-Player of the Year by the Pennsylvania Interscholastic Athletic Association, and played college football for the Purdue University Boilermakers from 2011 to 2014, including two seasons as their starting center.

[3][13][23] His younger son, Patrick, played college football for the University of Michigan Wolverines from 2014 to 2017, including one season as their starting center.