Gregory Sessler

Mr. Sessler has served as the Executive Vice President and Chief Financial Officer ("CFO") of Spiration, Inc. since 2002, and is also currently a director and chairman of the audit committee of VLST, Corp. Prior to joining Spiration, Mr. Sessler served as Senior Vice President and CFO of Rosetta Inpharmatics, a leader in informational genomics, from March 2000 until its acquisition by Merck & Co., Inc. ("Merck") in July 2001 for $540 million. Mr. Sessler is a member of the AICPA and FEI, and he previously served on the board of directors of Corixa Corporation. He also serves on the Executive Committee and is a past chairman of the board of directors of the Washington Biotechnology and Biomedical Association. Mr. Sessler holds a bachelors degree, magna cum laude, from Syracuse University and an MBA from the Stanford Graduate School of Business.