Arseneault Jr., who previously played and coached at Grinnell, returned to Grinnell in 2017-18 after two seasons leading the Reno Bighorns, the NBA D-League affiliate of the Sacramento Kings.

In his final season with the Bighorns, they won the Western Conference with a 33-17 mark, claimed the Pacific Division title and set a D-League record for offensive efficiency. Arseneault Jr. was named Coach of the Year by SB Nation. Over a two-season span, the Bighorns posted a 53-47 record and had six players called up to the NBA. They led the league in numerous categories, including points per game, 3-point field goals, 3-point percentage, assists per game and assist-turnover ratio.

As a collegiate coach, Arseneault's 2019-20 team led NCAA Division III in blocked shots per game.

As a player at Grinnell, Arseneault Jr. was a three-time finalist for the Bob Cousy Point Guard of the Year Award while finishing as the NCAA Division III all-time leader in career assists average with 9.4 per game. As a senior, Arseneault led the nation in assists per game (10.2) and ranks 11th on the Pioneers' all-time scoring chart with 1,462 points.

Arseneault Jr. also serves as the Pioneer women's golf coach and in 2019 led the team to a ninth-place national finish.