John Fredric Clark passed away on Sunday, August 6th at the age of 76. John was a loving husband, father and grandfather. John was born on June 12th, 1941 in Eustis, Florida and was the son of Harry A. Clark and Jeannette H. Clark. He graduated from Mount Dora High School and was furthering his education in Florida when he joined the United States Air Force, where he worked on the Mace Missile Program until 1967. It was during this time when he met and married Diane Hullinger of Glendale, Wisconsin. They celebrated the birth of their daughter, Kim in Asheville, North Carolina before returning to reside in Wisconsin. John graduated with a business degree from the University of Wisconsin-Milwaukee and spent his career working in finance, sales and sales management in the heavy construction equipment industry until he retired in 1998. John enjoyed spending time with family and especially his three grandchildren. John and Diane spent many wonderful years together in Marco Island, Florida and recently celebrated their 50th wedding anniversary surrounded by family. John loved traveling throughout the south, cross country motorcycle trips and researching his family genealogy. He was never at a loss to entertain with a story, memory or ancestral "find." John is survived by his wife Diane, daughter Kim Stephens (Adam), grandchildren Riley, Quinn and Nolan. Also survived by his three brothers, Jerry (Sandy), Douglas (Cathy) and Jim (Sandy), his sister in law Janis McCaskey (Charles), nieces Stacy Clark (children Austin and Blaine) and Isha McCaskey (children Kalyja, Nicoya, Gideon and Zeida) and nephews Christopher, Andrew and Brent Clark. The Clark family would like to thank Dr. Kathryn Bylow and all members of his Froedtert oncology team who provided such skilled and compassionate care. A celebration of life will be held on Monday, August 14th at the Eernisse Funeral Home,1600 West Grand Avenue, Port Washington, with visitation at 3:00 pm until the service at 4:00 pm. In lieu of flowers, donations to the American Cancer Society would be appreciated.