He is currently the head coach Sacred Heart and was previously an assistant at Yale.
[3] In 1992 Marottolo returned to the North Haven area to serve as an assistant at Trinity in Hartford and later transitioned to the same position at Yale.
Marottolo worked for Yale for thirteen seasons, helping the team reach the NCAA tournament in 1998, the first time the program had done so in 46 years.
In 2009 the Bulldogs won their first conference tournament championship and returned to the NCAA bracket.
Marottolo was expected to continue his role at Yale until Shaun Hannah, the head coach at nearby Sacred Heart, suddenly resigned a month before the 2009–10 season began.