A native of Massapequa Park, N.Y., Diange starred in football and lacrosse at Farmingdale High School and helped the gridders to the 1971 New York State Championship. Diange is a 1977 graduate of SUNY Cortland, widely considered the cradle of college lacrosse coaching, where he earned a bachelor's degree in physical education. A standout midfielder, he was a member of the Red Dragons' 1975 Division II National Championship squad. He also spent one year as an assistant coach at Albany while earning a master's degree in education. Diange and his wife have three children.

The longest tenured assistant coach at the United States Military Academy, Anthony "Mac" Diange enters his first season with the USMAPS lacrosse program.  Diange arrived at West Point in 1990 following a nine-year stint on the Division III level as head lacrosse coach at SUNY Geneseo. Mac was nominated to be the head coach at USMAPS after many successful years as Army Lacrosse’s assistant coach and has been an integral part of its success. The veteran assistant, who was named the 2010 Assistant Coach of the Year by the Intercollegiate Men's Lacrosse Coaches Association in 2012, will continue to manage Army's offense. Diange is also a top-notch recruiter with deep roots on Long Island and in the Hudson Valley.

While at the Academy, the Long Island native teamed with legendary coach Jack Emmer to bring stability and continuity to the Black Knights' sideline when he joined the West Point staff in 1990 and continued his tenure at the Academy with the arrival of Joe Alberici as head coach prior to the start of the 2006 season.  During his time at the Academy, Diange has tutored the five of the most prolific scorers in Army lacrosse history, a group that includes a pair of Tewaaraton Trophy finalists in John Walker '06 and Jeremy Boltus '11.