Mr. Dietel was born 14 August 1927 to a country doctor and his nurse wife. He attended the Phillips Exeter Academy, was awarded a BA by Princeton University and a PhD from Yale University. After 17 years in various academic posts he joined the Rockefeller Philanthropic Office and the Rockefeller Brothers Fund, a foundation. He created a philanthropic consulting firm in 1988 which became Dietel and Partners. He retired in 2016. He has been a trustee and officer for over 20 non-profits including the New York Public Library, the Child Care and Learning Center, American Farmland Trust, Board Source, and The Heron Foundation. He moved to Rappahannock in 1982. He co-founded the Foothills Forum and now serves as a trustee of the Rappahannock Public Library and as a special advisor to Rapp at Home.