Harriss Cook was educated at Washington University in St. Louis. Harriss has a BA in mathematics/history and an MBA in finance. Harriss is a US national who has lived in the UK since 1993.
From 1988 to 1992, Harriss arranged big-ticket leveraged lease transactions financing assets as diverse as ocean‑going vessels and television satellites. Harriss joined the British merchant bank Kleinwort Benson in 1992, working initially in New York and from 1993 onwards in London. Having set up and run a structured products group for five years within a subsidiary of The Bank of Tokyo-Mitsubishi, Harriss co-founded Ekhinos in early 2003.