John J. “Jack” Nessler, 86, of Mingo Junction, Ohio, passed away Tuesday October 20, 2026 at the Carriage Inn of Steubenville, OH.

He was born January 16, 1940, in Dunmore, PA, a son of the late John J. Nessler, Sr. and Marie F. (Riedell) Nessler. In addition to his parents, he was preceded in death by a sister, Julie Nessler.

John worked as an electrical engineer for a combined 45 years at Wheeling Pittsburgh Steel Corp and Weirton Steel Corp. He also served on the consulting team that helped restart Wheeling Pittsburgh Steel after its closure. He was a member of St. Agnes Catholic Church and the Mingo Junction Knights of Columbus, Council #4361. In his spare time, he enjoyed hunting on his property in southeast Ohio and building and flying radio-controlled airplanes. He was a past president of the former Jefferson County Radio Control Club. A fan of both the Pittsburgh Steelers and Pittsburgh Pirates, he attended many of their games.

Surviving are his wife of 57 years, Mary A. (Olenick) Nessler, whom he married May 3, 1969; three sons, John (Mary) Nessler, III of Powell, OH, James (Angela) Nessler of Powell, OH and Eric (Heather) Nessler of Dublin, OH; a sister, Dorothy Nessler of Dover, Delaware; and four grandchildren, Jimmy Nessler, Madeline Nessler, Jack Nessler and Elsa Nessler.

Friends will be received at St. Agnes Catholic Church, 204 Sinclair Ave, Mingo Junction on Friday November 13th from 12:00 p.m. until the time of his Funeral Liturgy with Mass at 1:00 p.m. with Rev. Fr. James M. Dunfee, celebrant.

Memorial contributions may be directed in John’s memory to UPMC Hillman Cancer Center - www.upmchillman.com/donate.

Offer condolences at www.wheelerfuneralhomes.com.