A funeral mass was offered Dec. 6 at Our Lady of Fatima Church for John P. Ninivaggi. He died unexpectedly of natural causes in his home in North Bergen on Dec. 1. John was born on June 10, 1954 in Hoboken and lived in North Bergen and Ridgefield. He was the only son of Mary (Marciano) and the late Perry Ninivaggi. He was a dedicated and expertly skilled craftsman and engineer. He worked as a technician for fiber optic systems for over 30 years at Verizon, and after retirement worked as an engineer at Fuchs Audio Technology. He was a talented guitar player. He had an unparalleled ability to restore not only guitars, but anything he loved or was fascinated by that needed fixing. He is survived by his wife of 39 years, Helene (nee Habermann); his daughters, Krista and Alise; his son-in-law, Alise’s husband David Machinist; and his mother, Mary. He also leaves behind his two beloved cats, Sallie and Dahlia.Services arranged by the Vainieri Funeral Home, North Bergen.