Gallant filled the defensive coordinator position following the departure of John Orsen after the 2019 season.

2021: Gallant coached the 11th-ranked scoring defense in the country in the 12-5 campaign, a record that included a 9-1 mark in the BIG EAST and another regular season title for the Pioneers.

2020: COVID-19 shortened the 2020 season. The Pioneers were young and starting to turn the corner when the season was cut short after just six games. Denver ended the season with a win at No. 10 Notre Dame, a 14-11 victory that included a 7-0 run in the middle of the game.

Tierney on Gallant:
"John checks all the boxes for what we were looking for in filling this all-important role on our staff," Tierney said. "First and foremost, he is a teacher. Coaching is teaching, and having the skill set to educate young people in the right way is now more important than ever. Secondly, we were looking for maturity and the ability to blend smoothly into our staff. John and his wonderful family, including his wife Jessie, are totally invested in our program. At every level, I've watched John get amazing results by being a hard worker and great communicator. He was a captain, has been a head coach and is a World Champion. He lives what he professes with a calm demeanor and a disciplined and caring approach, while possessing a willingness to do whatever it takes for our team to succeed."

Pro Career: Gallant was a two-time captain for the Colorado Mammoth, and wore the 'A' on his chest in two other campaigns during his 14-year National Lacrosse League career. A member of the Mammoth's All-Decade Team in 2012, Gallant moved with the franchise from Washington to Colorado in 2002, completing his career with a single franchise. In his career, the Mammoth defenseman played in 209 games, scored 14 goals and added 86 assists for 100 points. Gallant also picked up 953 loose balls and caused 54 turnovers.

Prior to Denver: Gallant was a science teacher and lacrosse coach at Rock Canyon High School before joining the Pioneers staff. In his three seasons in charge at Rock Canyon, the Jaguars went 12-4 in 2017, 12-4 in 2018 and 14-3 in 2019 (38-11 overall). The Jaguars reached the 5A CHSAA Quarterfinal in 2019.