Juan Antonio Diaz (John), of Ridgefield Park, passed away on Friday, September 4, 2020 at the age of 84 years. United States Air Force veteran that served his country from 1955 through 1960. Retired Vice President of Swiss American Securities, Inc. of New York. Avid tennis player that enjoyed competition and his time on the court. Beloved son of the late Angela (nee Flecha) and Antolin Diaz. Loving husband of Noemi (nee Nieto) Diaz. Devoted father of Elizabeth Diaz, Ruth Scillieri, Joanie Sharp and her husband Kenny, Jennifer Burns and her husband Mike, and Tony Diaz. Cherished grandfather of Luke Scillieri. Dearest brother of the late Lucy, Fran, Angelo, and Nestor. Visitation will be held on Wednesday, September 9th from 4 to 8PM. Cremation is private.