Gregory Sullivan
elevated n0X3a August 7, 1956 ~ November 30, 2025
elevated n0X3a Visitation
Thursday, December 4, 2025 from 11:00 a.m. to 1:00 p.m.
Assumption Catholic Funeral Home
6933 Tomken Road, Mississauga, Ontario L5T1N4
elevated n0X3a Funeral Service
Thursday, December 4, 2025 at 1:00 p.m.
Assumption Catholic Funeral Home
6933 Tomken Road, Mississauga, Ontario L5T1N4
Burial
Assumption Catholic Cemetery
6933 Tomken Road, Mississauga, Ontario L5T1N4
elevated n0X3a Obituary
It is with deep sorrow that the family of Gregory Sullivan announce his passing on November 30th. Born in Toronto, Ontario in 1956 to Thomas and Evelyn (Hosick) Sullivan.
elevated n0X3a Greg is survived by his beloved partner, Linda, mother Evelyn; children Christopher (Stephanie) and Elizabeth; siblings Brenda (Greg), Louise (Kevin), and Daniel (Laura); and grandson, Arthur; as well as many other friends and family members. Predeceased by his father, Tom.
elevated n0X3a As a boy, Greg was known to bring home animals of all kinds – turtles and snakes were particular favourites. His care for wildlife continued throughout his life. He would always stop to help turtles cross the road or bring them to wildlife rescue if they needed medical attention.
elevated n0X3a Greg attended the University of Waterloo and obtained degrees in both geology and electrical engineering. He started his career working alongside his father at Litton Systems. He worked as an electrical engineer for most of his life. Over his career, he worked across several companies, including HP Inc., Genesis Microchip, and L3Harris.
elevated n0X3a Later on, Greg moved to Brampton, Ontario, where he started a family. His family later moved to Palgrave, Ontario, where he enjoyed peace in the country. Some of his greatest joys came from his children, Christopher and Elizabeth. They created many memories while spending time at their cottage in Whitestone, Ontario.
elevated n0X3a Gregory met his soul mate, Linda, at a dance in the fall of 2023. They had a beautiful relationship, with comfortable ease and shared humour that made it seem they had been together for decades. In the last several months, they supported each other through their respective cancer treatments.
elevated n0X3a Greg was blessed with the arrival of his grandson in July 2024. Greg loved to play with and spend time with Arthur, and had been making plans to relocate to Ottawa so he could spend as much time with him as possible.
elevated n0X3a Greg loved nature, dancing with friends, his dog Shelby, engaging in deep conversations, and spending time at the cottage. His laugh was contagious, heart-warming, and could lighten any room. He had a warm, playful nature and was known to affectionately tease the people he loved. He was a man of many passions. Whether it was beekeeping, geology, car mechanics, family history, photography, or Pokémon catching, Greg led a busy and fulfilling life.
elevated n0X3a Greg will forever be remembered for his humour, positivity, and his endless love for family and friends.
elevated n0X3a A service celebrating Gregory’s life will be held at Assumption Catholic Funeral Home on Thursday, December 4, 2025 at 1:00 p.m. (visitation from 11:00 am to 1:00 pm). Instead of flowers, donations can be made to the National Wildlife Centre located in Caledon, or Princess Margaret Hospital.
elevated n0X3a Many thanks to all the caring nurses, doctors, and other hospital staff at Princess Margaret Hospital and Mount Sinai Hospital for their compassionate care and kindness.
elevated n0X3a Memorial Tributes
In lieu of flowers, the family asks for donations to be made to the Princess Margaret Cancer Foundation or to the National Wildlife Centre
elevated n0X3a
With most sincere condolences 💐 to you all the much love and acknowledging the privilege of knowing Greg 🥰
My condolences to all of Greg’s family. Greg was a lot of fun and had a zest for life. He will be missed by many.
May the wonderful memories of you bring smiles and comfort to your friends and more importantly family.
My heartfelt condolences to Greg’s family on his passing. Please know that he and all of you are in the Hanlon Family prayers at this time.
Greg’s vitality for life and His wisdom n humour touched the lives of so many of us in both the KW/ Cambridge areas as well as the Dance group in Brantford.
He will be surely missed. My sincere condolences to all of his family during this difficult time of loss especially at this time of year
My condolences to Greg’s family.
I worked with Greg at Genesis Microchip, and he always had a smile on his face and a joke or story to share.
He was a talented engineer and a pleasure to work with.
I’m so sorry to hear of your loss, Louise. My condolences to you and to your whole family.
My sincere condolences to your family .
Greg’s sense of humour was so appreciated. His laugh was contagious. He had great dance moves on the dance floor. Spending time with Greg was always a lot of fun. Sending my deepest condolences to his family and friends. RIP Greg.🙏🙏🙏🙏🙏
We only knew Greg a short and good time. Linda and Greg were so good together it was heart warming to listen to from afar. Our condolences to all Donna & Peter Ord & family
My deepest condolences to family and friends. It was such a pleasure and honour to have known Greg.
I’m very sorry to hear of Greg’s passing. I worked with him as well and we had many side conversations about Mustang’s and old Ford engines. He liked to share video of wildlife at his cottage. My condolences to his family. Remember the Good Times!
Cousin Greg was the age of my older siblings, so I was always the observant little kid who sometimes tagged along. I appreciated his passion for what he considered to be important. He was dedicated to learning about nature and teaching us about what he knew.
Greg was a sensitive person who lit up when he was fully engaged.
peace to you
I was very sorry to learn of Greg’s passing. He was joyful, exceptionally smart, always engaging and a very genuine and good person.
Condolences and best wishes to his family and friends.