John N. Irwin III
Irwin earned his Bachelor of Arts degree in politics at Princeton University.
In 1997, Worth agazine reported that John N. Irwin III was one of "the 100 individuals and families who own the biggest chunks of the nation", with ownership of 215,000 acres in Arizona and California.
"The ORO Ranch, north of Prescott, Arizona, is one of those legendary spreads. It runs for hundreds of thousands of acres, an area so big that the cowboys use chuck wagons in the field because a network of roads would be too expensive to maintain. According to Arizona records, the ORO Ranch's deeded portion -- 165,000 or so acres -- belongs to John N. Irwin III, 42, a New York venture capitalist who is a managing director of Hillside Capital. His grandfather was Thomas Watson, the founder of IBM. In San Benito County, California, according to local officials, Irwin also owns two cattle ranches near Hollister that total 60,000 deeded acres. He did not return our calls." 
- Advisory Council Member, Center of International Studies/Woodrow Wilson School of Public and International Affairs(Fellow 1976)
- Charter Member, American Academy of Diplomacy(1983)
- Trustee, Achelis and Bodman Foundations
- Trustee, Wildlife Conservation Society
- Director, Fresh Air Fund
- Trustee, World Conservation Society 
- Fellowship Program Board, Watson Fellowship Program