John G. Harrington, age 85, passed away peacefully on April 4, 2022 at the Renaissance Manor in Holyoke. He was born on June 28, 1936 in Holyoke and lived most of his adult life in Pennsylvania. He was a son of the late Francis and Mildred (White) Harrington. John graduated from University of Massachusetts and went on to earn his Masters degree from the University of Illinois where he also worked as a teacher's assistant. He worked at Boeing Aircraft for several years before he began his career as a computer programmer at Lockheed Martin. He was an avid hiker and loved his trips to China, Alaska and Hawaii. He is predeceased by his brother William Harrington, his sister and brother-in-law, Joan and Francis Golen, and his nephew Brian Harrington. He is survived by his sister-in-law, Yvette Harrington of Chicopee; two nephews, Thomas Harrington and his wife Sandra of Granby and Francis Golen and his wife Andrea of Malvern, PA and one niece, Paula Deglis and her husband John of South Hadley along with his great nieces and nephews, Bradley, Jillian, Kristen, Kevin, Jennifer and Sean. All services are private at the convenience of the family. Memorial contributions may be made to the American Heart Association 7272 Greenville Ave. Dallas, TX 75231. For online condolences, please visit www.GriseFH.com.