He is the first and only men's lacrosse coach in school history, having founded the program in the spring of 2016.

A Carthage, N.Y. native, St. Laurent has posted a 48-24 career coaching record at ONU, a .667 win percentage.

He has guided the Polar Bears to four consecutive winning seasons and three straight Ohio Athletic Conference upper-division finishes. Ohio Northern registered an 8-7 mark during its inaugural season in 2016, a 9-7 record in 2017, a program-best 14-3 record in 2018, and a 13-5 overall mark in 2019 under St. Laurent's leadership.

In addition to his collegiate coaching duties, St. Laurent servs as the head coach for the Redwoods squad of the Premier Lacrosse League during the 2019 season. In December 2018, he was named one of six head coaches for the inaugural season, which included the best leaders, strategists, and innovators in the sport.

During the 2019 campaign, St. Laurent directed Northern to its first OAC Tournament championship game in program history. As the No. 4 seed, ONU upset top-seeded Capital 10-9 in the semifinal round to book a date in the finals with John Carroll.

In 2018, he guided the Polar Bears to the program's first OAC Regular Season title in just its third season as a varsity sport. For their efforts, they also advanced to their first OAC Tournament in program history.

“We are very excited to start men's lacrosse with Nat St. Laurent as our first head coach,” ONU director of athletics Tom Simmons said. “We were very methodical in our men's and women's lacrosse coaching searches so that we could provide our student-athletes with the best possible structure. Nat has an excellent reputation in intercollegiate lacrosse, and we look forward to much success in the program.”

“I am really excited to take on the challenge of building the men’s lacrosse program at Ohio Northern University,” St. Laurent said. “ONU has all the tools in place to build a successful program. It was a difficult decision to make, leaving a top-10 program such as Washington & Lee. It had to be the right fit."

“Coming to Ohio Northern just feels right. I was extremely impressed with the facilities, the people at ONU, and the support of the university from the administration. I want to thank Tom Simmons, (ONU provost) Dave Crago, and (ONU Associate Vice President for Academic Affairs) Julie Hurtig for having faith in me to build the program.