In a career move away from academia, Von Clemm followed his father and grandfather to Citibank in 1963 where he gained a reputation for innovation – and . He responsible for inventing several financial instruments and services. He found himself posted to London where he worked with a fellow American, Stanislas Yassukovich, at White Weld, on the development of the Eurodollar CD market. Citibank launched its first Eurodollar issues in 1966. However Von Clemm went back to Harvard Business School to lecture.