Forrest played four years with Boston College winning the NCAA Championship in 2001 whilst earning Hockey East All-Rookie honors.

He was an ACHA Second-Team All-American in 2003 before graduating in 2004, serving as an alternate captain in both years.

He retired in 2014 following two seasons with the Augsburger Panther of the Deutsche Eishockey Liga in Germany.

[1] Following his retirement, Forrest was an assistant coach with the USA Hockey National Team Development Program winning Gold at the Under-18 IIHF World Championships in 2015.

He then coached the farm club of EC Red Bull Salzburg in Austria for one season, before he was named by the Pittsburgh Penguins on August 2, 2016 as an assistant coach for their affiliate, the Wilkes-Barre/Scranton Penguins of the American Hockey League.