 Marino played junior hockey with the South Shore Kings in the United States Premier Hockey League before he was selected in the fifth-round, 154th overall, by the Edmonton Oilers in the 2015 NHL Entry Draft.After a single season with the Tri-City Storm in the United States Hockey League (USHL), he committed to a collegiate career with Harvard University of the ECAC.Marino played college hockey at Harvard from 2016 to 2019.