Don Sullivan

Administrative Partner


Current Companies



Don joined Greylock in 2000. He oversees the operational, financial and administrative aspects of the firm.

Prior to joining Greylock, Don served as chief financial officer of Wildfire Communications (a Greylock portfolio company), where he focused on private financings and strategic relationships, and was instrumental in the acquisition of Wildfire by Orange in April 2000. Before Wildfire, Don served as finance vice president for SQA where he focused on the sale of SQA to Rational Software (now part of IBM) and then worked within Rational on other M&A transactions.

In previous roles Don was finance director at CrossComm, a publicly-held networking equipment company, and worked for Ernst & Young, LLP, specializing in early-stage technology companies.

Don graduated summa cum laude from Assumption College with a Bachelor of Arts in Finance and is a CPA.