After graduation, Manchel served as an assistant coach at Slippery Rock for two seasons before joining the coaching staff at Yale under Dick Kuchen for five seasons.[7] In 1992, Manchel would become the head coach at then-Division IIUMass Lowell, where he replaced Stan Van Gundy, who coached Manchel while he was an assistant at Vermont.[4] While coach of the River Hawks, Manchel compiled a 131–125 overall record, including an NCAA Division II tournament appearance in 2001, a season in which he was named NE-10 Coach of the Year.[8][9]
In 2001, Manchel would join Tim O'Shea's staff at Ohio for a pair of seasons before taking the head coaching position a Mercyhurst.[10][11] In 21 seasons at the helm, Manchel has guided the Lakers to seven NCAA Division II tournament appearances, reaching the Elite Eight in 2019.[12] On February 7, 2024, Manchel notched his 500th career win as a head coach.[13]
National champion
Postseason invitational champion
Conference regular season champion
Conference regular season and conference tournament champion
Division regular season champion
Division regular season and conference tournament champion
Conference tournament champion