WATERBURY – Mark Deziel, age 59, of Waterbury, passed away unexpectedly on May 13, 2023, at home. He was the husband of Shelley (Grindrod) Deziel to whom he had been with for 35 years.
Mark was born on March 20, 1964, in Waterbury, CT, the son of the late Richard and Shirley (Smart) Deziel. He was a graduate of Watertown High School and then went to work for Deziel’s Auto Transmission for many years, and was working at Sealed Air in Danbury at the time of his passing. When Mark wasn’t working, he enjoyed mowing his lawn, watching Nascar, loved cars, especially hot rod muscle cars, enjoyed helping his neighbors with mowing or snow blowing and almost anything they needed. Most of all, he loved being around his family and friends. Mark will be greatly missed by all who were blessed to know and love him.
Left to honor his legacy and cherish his memories besides his wife, Shelley, are his sister, Donna Deziel, a sister-in-law, and 3 brother-in-laws. He leaves nieces and nephews; Cheyenne, Denny III, Jordan, Sydney, Jesse, and Noah, along with cousins, extended family, and friends. Mark was predeceased by his sister, Sandra Deziel, and beloved nephew, Alex Deziel Marciano.
All funeral services for Mark Deziel will be held privately at the convenience of his family. To honor Mark’s memory and in lieu of flowers, please consider a donation to a charity of the donor’s choice. Casey-O’Neill Funeral Home, 742 Main Street, Oakville is honored to be assisting the Deziel family during this difficult time. Loving-kindness is always welcome, and it only takes a moment to offer a message of condolence, words of comfort, or share a memory with the family and friends of someone important to you. Please visit the funeral home’s tribute page at
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