Mark Allen Ivanhoff

Mark Allen Ivanhoff, 68, of Chapel Hill, North Carolina, passed away unexpectedly on Saturday, February 21, 2026.

For more than 35 years, Mark was the quiet cornerstone of his small but deeply devoted family - a loving husband to Karen Ivanhoff and a proud, devoted father to Jennifer Lavallee, whom he cherished as his own. Mark never needed to be the loudest voice in the room. He showed his love in quieter, lasting ways: in his steady presence, in the thoughtful advice that was always well considered, and in the simple but often question, “What can I do to help?”

Mark possessed a brilliant engineering mind and a lifelong love of technology. The work he did was complex and sophisticated - often beyond what most of us could follow - yet he carried his intelligence with remarkable humility. Recruited by IBM while still in college, Mark began his career in 1979 and dedicated more than 35 years to the company. His loyalty, skill, and quiet competence left their mark everywhere he went. His career took him to Boca Raton, Austin, Portland, and Raleigh before he retired in 2015.

Born and raised in Freeport, Illinois, Mark was the son of Richard and Estelle Ivanhoff. He earned a Bachelor of Science in Engineering from the University of Illinois Urbana-Champaign and later a Master’s degree in Technology from the University of Miami. Whether building systems or building a life, Mark approached everything with thoughtfulness, precision, and care.

But Mark’s greatest joy was never found in titles or technical achievements - it was found at home. Karen and Jennifer were his world. He took deep pride in being dependable, in fixing what was broken, in researching what others couldn’t quite solve, and in creating a sense of steadiness for the people he loved.

He also had a special tenderness for his four-legged family members. His love for Coco and his beloved dachshunds was unmistakable. He delighted in their company, their comedic personalities, and the sweet companionship they offered. They were never just pets to Mark, they were family too.

Mark will be remembered for his gentle strength, brilliant mind, and a measured wit that was as thoughtful as the man himself - intelligent, steady, and never careless. He is survived by his beloved wife, Karen Ivanhoff; his daughter, Jennifer Lavallee, and her husband, Charles Lavallee; and his mother-in-law, Carolyn Carlo. His legacy will live on in the stability he created, the love he gave without fanfare, and the values he quietly passed down.

A private service will be held by the family. In lieu of flowers, the family asks that Mark be remembered through simple acts of kindness and quiet care for others - the kind of everyday goodness that defined his life. Mark will be laid to rest in Boca Raton, Florida, alongside family.

He will be deeply missed, fondly remembered, and forever loved.