Michael Thomas Callahan's Obituary
Michael Thomas Callahan was the youngest of nine children born to Helen and Terrance M. Callahan. 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. But writing was only one facet of his remarkable life.
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 when working at some of the largest companies in the US.
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 extraordinary intellect.
Michael died unexpectedly on Wednesday, May 14th, 2025.
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; and fourteen great-nieces and -nephews.
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.
Memorials may be sent to the Best Friends Animal Sanctuary at [email protected] or the animal welfare organization of your choice.
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