Karl Mathieu Retires After 23 Years at Cranbrook

Mathieu joined Cranbrook in August 2003, and his memories reach into nearly every corner of campus life: helping students over breakfast in the Math Office, working with boarding students during dorm duty, taking class pictures at the end of each year, and attending home sporting events. He remembers Friday night pool games in the basement of Kresge after hockey games, serving his colleagues on Faculty Council, and the camaraderie of the Math Department from his very first day.

Some moments stand out for their surprise; others for their personal significance. There was the first “AIM HIGH” at his first convocation—and the pleasure of watching each new group of faculty experience it for themselves. There was the honor of receiving the Dawkins Award. And there was the high five he shared with his daughter Grace at Christ Church after handing her her diploma.

Softball brought its own collection of memories, from evening and weekend off-season training in Wenger to the new dugouts and ribbon-cutting ceremony celebrating the field renovation. Across all those settings, working with students and developing their trust remained central to his experience.

His students noticed the care he put into that work. In an October Crane-Clarion article by Lillian Xu, student Harrison Hwang described Mathieu’s ability to create original math questions that brought together the many nuances students needed to understand. Senior Sarah Sim offered an affectionate assessment of the teacher behind those challenges: “I feel like sometimes he’s a perfectionist, like a grumpy angel type of person.”

For the alumni he taught, coached, and advised, Mathieu’s parting advice will likely sound familiar.
“Be honest with yourself and everyone you have in your life,” he wrote. “Be able to look in the mirror and honestly and earnestly know that you gave your absolute best.”

That expectation came with an understanding that growth never ends. “Commit to excellence,” he continued. “Everything is a work in progress, including ourselves, so ‘Get to Work!’”

Retirement brings a different kind of work, along with room to enjoy it. Mathieu and his wife, Rose, are completing their new house and looking forward to time together, welcoming visitors, and sharing what they have. They are also enjoying the prospect of being able to take time to do, as he put it, “whatever.”

Even after retiring, a few Cranbrook responsibilities have followed him: when he responded to Alumni Relations, he still had college recommendation letters to finish. And his gratitude for the community remains strong.

“I am a different and better person,” Mathieu told the Crane-Clarion. “To all of you who have had an influence on me, I am sincerely and forever grateful.”