Age 65, of Robinson Twp., on Friday, April 6, 2018. Beloved son of Mary Helen (Joyce) and the late John Francis Gannon, Sr.; dear brother of Martin J. (Jenny) Gannon, Joyce (Dennis Roddy) Gannon, Nancy (Todd) Anderson and Cate Gannon; loving uncle of Nathan and Nora Gannon and Seamus and Mairead Roddy; proud Godfather of Kelsey Jancisin; nephew of Patricia Joyce and Barbara Lamb. Also many loving cousins and friends. John was employed as a professional project manager and cost estimator in the construction business. He was a member of the Ancient Order of Hibernians Division 32 in Carnegie. John was a proud graduate of South Hills Catholic High School and Villanova University. Friends welcome Monday 2-4 and 6-8 p.m. at WILLIAM SLATER II FUNERAL SERVICE, 1650 Greentree Rd., Scott Twp. 15220, (412-563-2800). Mass of Christian Burial in Our Lady of Grace Church Tuesday 10 a.m. If desired, memorial donations to UPMC Hillman Cancer Center, Development Dept., 5150 Centre Ave., First FL, Pgh. 15232-1309.