Harrison was a four-year letter-winner for Division I Army from 2007-10. He helped the team to a school-record season in 2010, ending as Patriot League champions and Quarterfinalists in the NCAA DI Tournament. He was the winner of the Walter W. Hollis Award for Excellence in Military Operations Research in April 2010.

After five years as an Officer in the United States Army, Harrison earned a Master's degree in Business Administration at Boston University in 2017. He was an assistant coach at BU for two seasons. He currently works in project management at KBR, Inc. in Cambridge.