I didn't know until now that Mark had passed away- He will be greatly missed.
Mark was a very good friend of Joe Boltinghouse, my father. Both of them enjoyed their engineering careers and shared their experiences as each wrote their life stories in a class together. I had the opportunity to meet Mark on several occasions, and he always had a kind word and interesting insight to share. He will be missed.
My sincere condolences to the family at this difficult time. May you find comfort in the promise that soon death will be no more... and never again will we have to bury our love ones again. (Rev.12:3,4)
With Deep Sympathy