Born in Brooklyn, NY, John was the beloved son of Kathleen and David Sullivan. An Alumni of Power Memorial, John after 44 years of service, was a retired electrician for Local 3 IBEW. Brother of Madge, Steve, Mary and Joan. Beloved Uncle to many nieces and nephews. Beloved Spouse of Jeanne M. Andersen-O'Sullivan. Loving and devoted Father to Joanne (Joseph), Maureen (James), Terry and Ryan (Lisa). Loving and devoted Step Dad to Eric (Kate). Kevin (Denise) and Susan (Jason). PopPop to 20 grandchildren and 5 Great Grandchildren. John was also predeceased by his first wife Jean O'Sullivan. Visitation Sunday 7-9 pm and Monday 2-4 AND 7-9 PM at Weigand Bros FH. Funeral Mass Tuesday 11:15 am St Aidan's Church. In lieu of flowers donations may be made to: The Leukemia and Lymphoma Society, 3 Huntington Quadrangle, 2nd Floor, Suite 202S, Melville NY 11747.