Mark J. Swierat "Swi", 76, of Buffalo NY and Dalton MA, has passed into Heaven on March 11th, 2026. He was the son of the late Dr. John V. Swierat and Eileen Kelly Swierat. He leaves behind a sister Christine (Robert) Ambrose. Beloved Uncle to Kellie (Daniel) Tadusz, Tracie (David) Seaman, Marcie (Brock) Pysher, Robert ( Bethany) Ambrose, and 12 beautiful Great-Nieces and Nephews. Mark was a very talented artist and his art is spread out locally, in Massachusetts and Martha's Vineyard. One of his favorite projects was working on movie sets and models for the 1995 movie "Judge Dredd". He loved running, bicycling, kayaking, and he always ran in the "Turkey Trot". He loved all things outdoors. He loved his Feline companions very much, too many to name or count. There will be a private service and burial. The family appreciates your thoughts and prayers during this time.