From 1977 to 1984, he coached Wall High School. He led the Crimson Knights to consecutive 11-0 seasons and NJSIAA Central Jersey Group III championships in 1982 and 1983. His teams won four straight Shore Conference divisional titles from 1981 to 1984.
Amabile coached at Neptune High School from 1985 to 2000. From 1993 to 1999, the Scarlet Fliers had a 33-game home winning streak. From 1994 to 1998, Neptune won five straight Shore Conference divisional titles, going unbeaten in 1995 and 1997.
From 2003 to 2008, Amabile coached St. John Vianney. In his six seasons with the Lancers, Amabile had a 22-38 record, with only one winning season and playoff appearance. In 2009 he coached Allentown High School.
Amabile compiled an overall record of 252-172-11. Only Warren Wolf and Vic Kubu are believed to have more wins in the Shore Conference.
^Staff. "John Amabile; Obituary", Asbury Park Press, April 24, 2012. Accessed August 9, 2012. "John Amabile, 73, of Spring Lake Heights, passed away Sunday, April 22, 2012, at Jersey Shore University Medical Center, Neptune, with his devoted family at his bedside. He was born and raised in Jersey City and moved to Spring Lake Heights in 1968, where he has resided for the past 44 years."