Stephen Stanley Koscielny, age 50, a resident of Chattanooga, passed away Monday, January 16, 2006 at the family residence. He was of the Catholic faith. He was employed with the Nuclear Regulatory Commission. He is survived by his wife, Mariola Eva Jur Koscielny of Chattanooga; mother, Stasia Bernat Koscielny; one son, William Koscielny of Raymond, Maine; two step sons, Martin Citowicki and Matthew Citowicki both of Boston, Mass.