He was first at IBM at the time of the mainframes, then at Exa Corporation, where he was a founder and Vice President of Product Marketing. In November 1995 he joined Digital Equipment Corporation as Cambridge Research Lab Director, and then went on to Compaq as Vice President of Corporate Research when DEC was acquired by Compaq.
He was initially at IBM during the era of mainframes, later at Exa Corporation, where he served as a founder and Vice President of Product Marketing. In November 1995, he joined Digital Equipment Corporation as the Director of Cambridge Research Lab, and subsequently moved to Compaq as Vice President of Corporate Research when DEC was acquired by Compaq.