Mark Heinemeier Obituary

With profound sadness, we say goodbye to Mark Heinemeier of Edwardsville, Illinois, whose vibrant spirit touched the lives of many. Mark left this world on March 9, 2026 at the age of 69, leaving a void in the lives of so many people. You can send your sympathy in the guestbook provided and share it with the family.

As Mark departs from our midst, his spirit ascends to join the cosmic dance of stars, a shimmering constellation of memories that will forever grace the night sky of the hearts of those who loved Mark. Though Mark may no longer walk beside us, his legacy lives on — a testament to the enduring power of love to transcend the boundaries of time and space.

He was predeceased by: his parents, Ramon Heinemeier and Arlene Heinemeier (Carlin); and his brother Michael Heinemeier. He is survived by: his partner Cathey Mueller of Edwardsville, IL; his son Michael Heinemeier of San Diego, CA; and his sisters, Karen Larken of Hendersonville, NC and Kris Mohler (David).

The family suggests memorials to American Cancer Society, Metro-East Humane Society, Madison County Animal Control, and Earthjustice Organization.