In his first season as head men's golf coach in 2007, Harbour led the Bears to a second place finish in the Ivy standings, Brown's best finish ever. In addition, two of his players, Larry Haertel and Conor Malloy, earned team All-Ivy honors, while Haertel became the first Brown golfer to win the New England Intercollegiate Golf Championship.
In four years as the women's coach at Brown, Harbour's teams captured three tournament championships, placing first at the 2003 Princeton Invitational, first at the Bucklell Invitational and capturing the title at the 2005 Central Connecticut Tournament.
A PGA golf professional and former golf coach at Johnson and Wales University, Harbour is recognized as one of the top teaching professionals in New England, Harbour is the Director of Golf at Mike Harbour's Golf and Learning Center in Exeter, Rhode Island, where he developed a learning center that covers all golf aspects. He was the head golf professional at Potowomut Golf Club (RI) from 1989-1999. While at Potowomut, Harbour was named the Golf Professional of the Year and Teaching Professional of the Year by the Rhode Island Chapter of the PGA. He also served as the head golf professional at the Lone Tree Country Club in Littleton, Colorado from 1992-1993.
Harbour was the head golf coach at Johnson and Wales University from 1998-2002, earning GNACC Golf Coach of the Year honors in 2001. He majored in Business Management at Rhode Island Community College from 1975-1977, and earned PGA Business School I & II certificates from 1982-1985. He earned a Business School III advanced professional training in 1995.