After three years as the first assistant men's lacrosse coach at Harvard University, George Harris was selected as Wittenberg University's men's lacrosse head coach in July 2005. He left Wittenberg in 2013.

In his first three seasons in Springfield, Harris led the Tigers to six wins each year, including back-to-back 6-6 records that marked the first time the Tigers had reached the .500 mark since 2000. The 2009 season set the bar higher for Harris and his program as Wittenberg enjoyed its first winning season in a decade with a 7-6 mark that set the stage for a breakout 2010 campaign in which the Tigers captured the first NCAC title and reached the NCAA Division III Tournament in program history. Harris was named NCAC Coach of the Year after leading the Tigers to their best record ever at 10-5, including a mark of 4-1 in the conference.

The following season turned out to be even better, as the Tigers broke into the national rankings while ripping off 11 straight wins to open 2011. Wittenberg won its second straight NCAC title and won its first-ever NCAA Division III Tournament game before falling to sixth-ranked Dickinson in the Round of 16. Under Harris' tutelage, goalkeeper Mark DeOliveira became the first Tiger to earn NCAC Player of the Year honors, and he and Matt Lord went on to earn All-America honors and berths in the annual North/South Game, also a first for the program.

Harris, who owns the Wittenberg record for men's lacrosse coaching victories, brought an impressive resume to Springfield, first as a student-athlete and later as a coach. A 1989 graduate of Ithaca College, Harris was a four-year starter for the perennial powerhouse Bombers, and he served as team captain his final two intercollegiate seasons. He returned to his alma mater in 1992 and served as a graduate assistant coach for the Ithaca women's lacrosse team the following spring, helping the Bombers to a No. 5 national ranking and a berth in the NCAA Division III Tournament quarterfinals.

That experience earned Harris the men's head coaching position at Skidmore College. After three seasons leading Skidmore, he took his 16-20 record leading the Thoroughbreds to the Division I ranks as an assistant at Colgate University in 1996. Harris helped the Raiders to two East Coast Athletic Conference championship game appearances and the 1997 title while serving as the teams offensive coordinator and goalkeepers coach from 1996-2001. He then moved on to Cornell University for the 2002 season, helping the Big Red to an NCAA tournament appearance and a No. 6 national ranking as the teams second assistant coach.

In his three seasons at Harvard as the first assistant, the Crimson posted a 17-24 overall record in the extremely competitive Ivy League. Harris served as the team's offensive coordinator and recruiting coordinator, and he was recognized for his outstanding work with the 2004 Harvard University Department of Athletics Merit Award, which is given to one assistant coach among the university's 37 varsity teams each year in recognition of professional commitment, dedication and overall program advancement.

Harris, who has a bachelor's degree in business management in 1989 and a master's degree in physical education from Ithaca in 1993, resides in Springfield with his wife, Gerin.