He was selected by the New York Islanders in the 3rd round (76th overall) of the 2013 National Hockey League Entry Draft. Cammarata was selected first overall in the 2011 United States Hockey League (USHL) Futures Draft by the Waterloo Black Hawks.
With Waterloo, he played two seasons of Tier 1 Junior hockey in the USHL where, in his first season, he was recognized for his outstanding play by being selected as the USHL"s 2011-2012 Rookie of the Year and was named to the USHL Second All-Star Team. The following season Cammarata was named to the 2012-2013 USHL First All-Star Team and was presented with the Dave Tyler Junior Player of the Year Award as the most outstanding American-born player in Junior hockey.
