Cliff has almost four decades of experience in venture investing and has backed some of the most successful companies in the communications industry. As a Castile advisor, he shares his market insights and keen ability to identify blockbuster technologies early in their development with Castile and its portfolio.

Past investments have included industry leaders such as Advanced Fibre Communications (NASDAQ: AFCI); America Online; Ciena (NASDAQ: CIEN); Digital Island (acquired by Cable & Wireless); Tellabs (NASDAQ: TLAB); MCI (NASDAQ: MCIP); and Octel (NYSE: OTL).

Cliff was a Founding Partner of ComVentures, a General Partner with Vanguard Venture Partners and is a Venture Partner with Walden International. He has also served as a Managing Partner and Director of Research for Hambrecht & Quist, and as a Special Limited Partner and Director of the Communications Group for L.F. Rothschild, Unterberg, Towbin.

Cliff holds an MBA from the University of California at Berkeley, and a BS from the University of Illinois.