Calkins, who wrapped up his 32nd year in 2020, was elevated to full-time status in the summer of 2009. Calkins is the longest-tenured active head coach at one school at the Division II level.

Postseason play has become the norm in recent seasons for the Penmen. SNHU has appeared in three of the last four Northeast-10 Championships and has made seven tourney appearances since 2004.

In 2016, Calkins was named the Northeast-10 Conference and New England Intercollegiate Lacrosse Association (NEILA) Coach of the Year after guiding Southern New Hampshire to its finest season in school history. He led the Penmen to program records for wins in a season (10), consecutive wins (8) and Northeast-10 Conference victories (7). Southern New Hampshire also captured its first-ever postseason win when it posted a 15-13 triumph over Pace University in the Northeast-10 Championship quarterfinals on May 3. The Penmen wrapped up their 2016 season with an overall mark of 10-6 that featured a 7-4 record in the Northeast-10 Conference. SNHU advanced to NE-10 Championship semifinals for the first time in program history and saw an eight-win improvement from the 2015 campaign.

In 2014, Calkins was named the NEILA Coach of the Year after guiding the Penmen to a 7-7 regular-season mark and the No. 5 seed in the NE-10 Championship.

A former two-sport athlete at SNHU, he led the Penmen to a 7-4 record in his rookie season and followed up with an 8-3 campaign in 1990. The eight wins tied the school record for most victories in a season.

In 1995 Calkins guided SNHU to a 6-6 record and an appearance in the semifinals of the ECAC Division II tournament--the program's first-ever taste of postseason play.

An active member of the United States Intercollegiate Lacrosse Association (USILA), he served on both the USILA Division II All-America selection committee and the USILA Division II national rankings committee.

Calkins lettered in lacrosse and hockey while a student at SNHU and totaled eight goals and 16 assists for the 1984 lacrosse team that finished 5-5.

A native of Baldwinsville, N.Y., he attended Baker High School where he lettered in hockey and lacrosse. He currently resides in Hooksett, N.H. with his wife Lori.