Marek J. Ptak, age 67, of North Versailles, died Monday, December 18, 2017. He was born in Dzierzoniov, Poland on June 30, 1950, the son of the late Zbigniew Ptak and Anna Debowska. He was preceded in death by his wife Urszula I. Kubera Ptak and his youngest brother from Poland. Marek retired as a supervisor for Tygart Steel and Sil-Base Refractories in North Versailles and was a union leader of solidarity in the 1980’s. He loved his family, children, grandchildren, and his Polish nationality. Marek is survived by his daughter, Agnes (James G. III) Knapton of Lincoln Borough, sons; Tomasz Ptak of Baldwin and Krzysztof K. (Sarah N.) Ptak of Stafford Virginia, grandchildren; Mark, Natalie, James, William, and Alexander. Friends and family will be received on Thursday, December 21st from 10:00 am until 11:30 am at Strifflers of White Oak Cremation & Mortuary Services, 1100 Lincoln Way, White Oak, PA 15131 (Sue Striffler Galaski, Supervisor 412-678-6177). Mass of Christian Burial will follow visitation on Thursday at 12:00 pm, Corpus Christi Church, with Fr. Steven Palsa officiating. Burial will follow.