Donald (Don) R. O'Sullivan, passed away April 15, 2015, surrounded by his family. Don was born December 11, 1936, in Long Island City, New York. He was the middle of five brothers born to Irish immigrants. He served in the Army in the 60's. He married his wife Patricia (Pat), on May 2, 1965. After working coast to coast and internationally, Don and his family moved to Longmont in 1981. He enjoyed the life he built in his adopted home state of Colorado. Don is survived by his wife Pat of Longmont. His children Patricia O'Sullivan of Denver, Donald (and Ronda) O'Sullivan of Denver, and Regina (and Robert) Smith of Aurora. Granddaughters Amanda and Isabelle Smith of Aurora and Aquinnah O'Sullivan of Denver. He is also survived by his brothers Kenneth, Kevin, and James, as well as many nieces and nephews.No services will be held to honor Don's final wishes. Visit www.ahlbergfuneralchapel.com to share condolences.