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Michael Callahan Obituary
July 12, 1966 - May 14, 2025
Michael Thomas Callahan was the youngest of nine children born to Helen and Terrence M. Callahan on July 12,1966. He died unexpectedly on Wednesday, May 14, 2025 in Salt Lake City.
Raised in Missoula, Montana, he attended St. Anthony Grade School and Loyola Sacred Heart High School, where his lifelong passion for writing first took root. From a young age, Michael was prolific penning plays, poems, and articles. A gift of tennis lessons from a family friend opened another door: one that led to high school tournament wins, a scholarship to New Mexico State University, and a lasting love of the sport.
Professionally, Michael was a pioneer in customer-focused technology. Though he started in technical writing, he quickly realized that the true challenge lay not in documenting software but in designing it with people in mind. That belief became his guiding principle at companies like Microsoft, Amazon, Hulu, and many others.
In 2019, ever ready for a new adventure, Michael moved to Salt Lake City. For an openly gay man, it might have seemed an unexpected destination. But he often remarked that the people he met there were among the kindest he'd ever known. His time in Utah, especially during the challenges of the pandemic, became one of the most productive, successful, and joyful chapters of his professional life.
Michael was a devoted pet dad to Flynn, Cooper, and Daisy. He was also a treasured uncle, enthusiastic tour guide, and generous mentor to many. His family and friends will deeply miss his sharp wit and his extraordinary insight and intellect.
Michael is survived by his sisters Cathy (Mike) Dunaway, Maureen (Don) Moe, Sheila Callahan (Max Murphy), Pegy Callahan, and Theresa (Bob) Becker; his brothers Tim (Ingrid) Callahan and Dan (Karen) Callahan; fifteen nieces and nephews; fourteen great-nieces and -nephews, and too many dear friends to mention here.
He was preceded in death by his parents, Helen and Terrence, and his brother, Patrick Callahan.
A celebration of Michael's life will be held later this summer.
Memorial donations may be made to the animal welfare or rescue organization of your choice.
To plant trees in memory, please visit the Sympathy Store.
Memories and Condolences
for Michael Callahan
Patsy McNamara Galiher
May 25, 2025
Such a kind , witty soul!! lots of memories from Bonner Park (the hood) , to most tennis courts in Missoula. Over the years it was always a treat to see him and reminisce of the good old days.
Sending my heartfelt sympathy to all The Callahan´s God bless !
Kelly Williams Johnson
May 24, 2025
I am so very sorry to hear of the passing of your brother. Losing a sibling is a tragic loss. My heart goes out to you all
Theresa Redfern
May 23, 2025
I am so sorry for your loss. Losing a sibling creates a unique kind of pain, and I hope that all the good memories will cradle you through its duration. Big hugs to all.
Colleen Tuxbury (Tripp)
May 22, 2025
Nicest guy ever. Always positive and happy. He Will be missed.
Chris Mandell
May 22, 2025
Michael was one in a million. My family and I have been lucky to have consistent interactions with Michael over the years as he moved from one adventure to another. His mind never stopped - ideas flowed and opportunities appeared - and he was not afraid to try new things and challenge himself. Michael is one of a handful of people I´ve know my entire life and it was a blessing to be involved in this nearly 60-year-long friendship. He was always kind and caring to me and my family. I will miss him. We all will. My condolences to his family, friends and all who loved him.
Kath McChesney-Lape
May 22, 2025
My heartfelt thoughts to all the Callahans. I remember Mike as a sweet, kind kid...always eager to challenge anybody on the tennis court. May his light forever shine in your hearts.
Ellen Woolley
May 22, 2025
Sheila I´m so sorry to hear about your brother.
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