Information provided by Mark's sister Blythe Steil Youngquist

Mark retired from Harrington & King Perforating Co. in 2006 where he was Vice President of Sales. Shortly afterwards, he moved from La Grange IL to Fontana WI. Mark was diagnosed with Alzheimer's in 2009. He was able to reside on his own for a few years with our help. In 2014, it was necessary to move him into an assisted living facility when day to day activities became more difficult. In 2018, after a series of health issues & hospital stays, he was moved into a full care nursing facility until the end of January when he suffered a seizure which left him in a coma. He succumbed on February 4th of 2019 while in Hospice Care at Lakeland Hospital-Aurora in Elkhorn WI.

Chicago Tribune Obituary

Mark Gordon Steil, 73, was born on March 17, 1945 in Oak Park IL. The loving son of the late Nathalie & Gordon Steil, River Forest IL, passed away peacefully on February 4, 2019 in Elkhorn WI from complications of Alzheimer's disease. Mark was the dear brother of Blythe (Bob) Youngquist & Linda (Brian) Carter; Father of Andrew (Taryn) & Emily Steil; Uncle of Allysia, Erick, Jaymie, Mallory, Madeline, Melissa, & Mitchell; Great uncle to Alexandria, River & Kole. Mark graduated from the U of Iowa. He served as a Naval officer on the USS Cochran during the Viet Nam War then as Vice President of Material Control fro Harrington & King Perforating Co., Chicago. There will be a private memorial. Donations can be made in Mark's name to Aurora Health Care Foundation (ALMC Hospice Care Fund) 950 N 12th St., Suite A627, Milwaukee WI 53233