Gonzaga

Monson began at GU as an assistant coach in 1988 and was elevated to associate head coach under head coach Dan Fitzgerald in 1994;^[1] in all, Monson spent eleven years helping build the Gonzaga program. As an assistant, Monson was a key figure in the Bulldogs turnaround during the 1990s. Gonzaga had a record of 223–89 (.715) over ten seasons and he was responsible for recruiting many of the key players in Gonzaga's NCAA Sweet 16 appearances from 1998–2001. From the time Monson was named associate head coach in 1995,^[2] Gonzaga averaged 22 wins per season and reached postseason play every year but one. For all of this, Monson was promoted to head coach of the Zags in 1997.

His first year as head coach at Gonzaga (1997–98) resulted in a 24–10 mark, as the Bulldogs won the West Coast Conference championship and advanced to the second round of the NIT. On their way to setting a school-record with its 24 wins, Monson was named the WCC Coach of the Year and National Rookie Coach of the Year by Basketball Times.

The 1999 team brought Gonzaga basketball to national prominence with an impressive run in the NCAA tournament. In the West regional, the tenth-seeded Zags defeated 7th-seed Minnesota^[3] and second-seed #7 Stanford in the Seattle sub-regional, then sixth-seed Florida in the Sweet Sixteen round in Phoenix.^[4] Gonzaga advanced to the regional final (Elite Eight), taking the region's top seed, eventual national champion Connecticut, down to the last minute, losing by five points.^[5]

While at the helm at Gonzaga, Monson had a 52–17 (.754) record in his two seasons and won both regular season titles.

Minnesota

Monson became one of the more sought-after coaching candidates in college basketball in the spring of 1999.^[6][7] After Gonzaga's improbable run to the Elite Eight, he signed a new contract in mid-April,^[8] then was offered the head coaching position at the University of Minnesota in late July, which he accepted.^[9][10] University president Mark Yudof was hoping that Monson would be able to help the program move past the scandals of previous head coach Clem Haskins.^[11][12] In the previous season, Gonzaga had defeated Minnesota in the first round of the NCAA tournament after several Gopher players were forced to sit out due to an academic fraud investigation. Mark Few, Monson's top assistant, succeeded him at Gonzaga. Monson also had ties to Minnesota already, as his father Don was born in rural Menagha.

In April 2002, Monson was courted by the University of Washington in Seattle to coach the Huskies and return to his home state of Washington. Monson initially accepted the offer presented by Huskies AD Barbara Hedges to succeed Bob Bender.^[13] The Minnesota athletic department, under Tom Moe, convinced Monson to change his mind and stay on with Minnesota.^[14] In the end, Monson decided to return to Minnesota because he didn't feel he had given enough time to the rebuilding effort at Minnesota and hadn't yet attained enough success with the team.^[13] Washington ultimately hired Lorenzo Romar.

Dealing with the fallout from the academic scandals of the Haskins era, it was several years before Monson was able to recruit on equal footing with other Big Ten coaches. He led the Gophers to one NCAA Tournament and 4 NIT appearances in his 7 full seasons as Gophers coach. Nonetheless, he was widely praised for cleaning up the program's image. On November 30, 2006, Monson resigned as head coach of Minnesota after a 2–5 start and only achieving a single 20-win season in seven. Assistant coach Jim Molinari was appointed interim head coach before Tubby Smith was named the new head coach after the season. Monson compiled a 118–106 (.527) record with the Gophers, giving him an overall career record of 170–123 (.580) as a head coach.

Long Beach State

On April 6, 2007, Monson was named the head coach at Long Beach State.^[15] The 49ers, now known as The Beach, improved in each of Monson's first several seasons, to the point that on February 24, 2011, Long Beach defeated Cal Poly 61–55 to clinch their first Big West regular season title since 2006–07 and the #1 seed in the Big West tournament. The following season, Long Beach State won the conference's regular season (15–1) and tournament titles, and advanced to the 2012 NCAA tournament. In all, Monson has led The Beach to postseason play four times, won the Big West Conference men's basketball championship three times, and been named Big West Conference Coach of Year award three times.

Under Monson, The Beach routinely play one of the most difficult non-conference schedules in the nation. The team usually plays the likes of teams such as North Carolina, Duke, Louisville, and Texas. According to Coach Monson this is to prepare the team for Big West conference play and ultimately the NCAA tournament.

Monson has also coached internationally; he was an assistant coach on the 1999 World University Games team and the 2004 USA U-20 team.

In 2018, a poll of Big West assistant coaches named Long Beach State as the "Best Job in the Big West". ^[16]

The 2021–22 season opener on November 10, 2021, served as a homecoming for Monson, as The Beach traveled to Monson's alma mater of Idaho to play the Vandals in the first regular-season game at Idaho's new home of Idaho Central Credit Union Arena.^[17] The Beach won 95–89 in overtime.^[18]

On March 11, 2024, it the school announced that they would be parting ways with Monson at the end of the season.^[19] Six days after the announcement, Long Beach State won the 2024 Big West tournament earning the team an automatic berth to the 2024 NCAA Tournament.^[20]