Mark William Jeanmougin , age 48, of Oxford, OH, passed away at home on April 17, 2026, after a courageous battle with brain cancer. He was born on December 16, 1977, in Cincinnati, OH to Paul and Zita Jeanmougin.

Mark was a proud graduate of St. Xavier High School and later earned his computer engineering degree from the University of Dayton. He built a successful career as a computer engineer with Siemens and also served as an instructor with SANS Institute, where he shared his knowledge and passion for information security with countless students.

Mark lived life with enthusiasm and warmth. He had a deep love for Formula 1 racing, took pride in his BMW, and cherished his Misfit Kitties. Known for his vibrant spirit, Mark never met a stranger and was a friend and mentor to all who knew him.

He is survived by his beloved spouse, Caitlin Erin Jeanmougin; his parents, Paul and Zita Jeanmougin; his siblings, Paul (April) Jeanmougin, Ann (Mark) Poynter, and Linda Jeanmougin; six nieces and nephews and their spouses; four great-nieces and great-nephews; and his eight adored rescue cats.

He was preceded in death by his grandparents, many aunts and uncles, and five beloved cats.

Ever the teacher, Mark made the generous decision to donate his body to the University of Cincinnati College of Medicine so that students may continue to learn from him.

A gathering will be held in the narthex of Bellarmine Chapel on the campus of Xavier University at 12:00 p.m., followed by a memorial Mass at 1:00 p.m. on Friday, April 24, 2026. All are welcome—regardless of race, religion, nationality, or sexual orientation—just as Mark would have wanted.

In lieu of flowers, donations in Mark's memory may be made to Hospice of Cincinnati https://hospiceofcincinnati.org/donate/ or The Oxford Catty Shack https://theoxfordcattyshack.com/donate/

Mark will be deeply missed and fondly remembered for his kindness, generosity, and the lasting impact he made on so many lives.

The memorial mass will be live streamed at the following link: https://m.youtube.com/watch?v=f2FpKm261GM