John D. Marckini, of Medford, suddenly on April 20th, 2025. Beloved son of John and Susan (Bouley) Marckini of Medford. Loving brother of Ryan and Joseph Marckini of Tewskbury. Dear grandson of Helen Marckini of Medford and her late husband Eugene “Gene” Marckini and the late Harold and Lillian Bouley. John is also lovingly survived by many aunts, uncles, cousins and dear friends. He has been a lifelong resident of Medford. Upon his graduation from Medford High Vocational Technical High School in 2008, he began working in his chosen field of carpentry. John was an avid golfer, fisherman and gamer. He was a fan of all of the Boston and New England Sports teams and enjoyed watching all of the teams in the National Hockey League. Relatives & friends are invited to attend his Funeral Mass celebrated at Immaculate Conception Church, 600 Pleasant St., Malden on Saturday May 3rd at 10 AM. Please omit flowers. Donations in his memory may be made to Faustman Lab-Cure Diabetes Now Fund, www.faustmanlab.org.