Age 39, of Bridgeville, suddenly on September 19, 2021. Beloved son of William and Joan (Brickner) Nath, loving brother of Nicole Steck and Tim (Katie) Nath, also nine loving nieces and nephews. Mark was a graduate of Chartiers Valley High School and the University of Pittsburgh. As a partner with MegaLasers, he had the rare opportunity to work in something he both loved, and by his colleagues' accounts, was "exceptional at," creating and managing laser displays from the deserts of Nevada to venues in New York and Mexico. At home he was generous with his time and skills, earning a reputation for willingness to lend a hand to friends and family. Friends received Thursday, 5-8 pm, at the Warchol Funeral Home, Inc., 3060 Washington Pike, Bridgeville (412-221-3333). A Mass of Christian Burial will be celebrated Friday, 10 am, at Our Lady of Grace Church of St. Michael the Archangel Parish. (EVERYONE PLEASE MEET AT CHURCH).