In addition to his responsibilities at NU, Hiller has found numerous ways to stay involved with both men's and women's lacrosse. Hiller served as the co-president and general manager of the Washington Bayhawks of Major League Lacrosse (MLL) after his dual role of head coach and general manager for the 2006 and 2007 seasons.

Prior to coaching the Bayhawks, Hiller served as the head coach of the Boston Cannons. He was a two-time selection as the league's Coach of the Year as he led the Cannons to back-to-back American Division titles and four straight playoff appearances. He guided Boston to a 10-2 record in 2005, tying Baltimore for the best mark in league regular season history. During his four-year tenure with the Cannons, Hiller compiled a 32-18 regular season record.

In his inaugural 2002 campaign, Hiller led the team to a 7-7 record and was named Coach of the Year. In 2003, the Cannons went 7-5 and secured their third consecutive postseason berth. The following season, Boston won a then team-record eight games and clinched the franchise's first American Division title.

Before joining the Cannons, Hiller spent eight seasons as assistant head coach for the Harvard men's lacrosse team. Prior to that, he had an outstanding playing career that included a U.S. World Team appearance in 1994.

Hiller graduated from the University of Massachusetts in 1990. He is third on the career points list at UMass, where he was one of just two players to be named All-America all four years. He was captain of the Minutemen as a senior and was inducted into the Massachusetts Athletic Hall of Fame in 2010. Hiller graduated from Suffolk Law School in the spring of 2001.