Thomas B. Okarma, Ph.D., M.D., has served as our President, Chief Executive Officer and a member of our board of directors since July 1999. He is also a director of Geron Bio-Med Limited, a United Kingdom company and Geron's wholly-owned subsidiary, and TA Therapeutics, Ltd., a Hong Kong company and Geron's majority-owned subsidiary. From May 1998 until July 1999, Dr. Okarma was the Vice President of Research and Development. From December 1997 until May 1998, Dr. Okarma was Vice President of Cell Therapies. Dr. Okarma currently serves on the Board of BIO and was Chairman of the Board of Overseers of Dartmouth Medical School from 2000 to 2007. In 1985, Dr. Okarma founded Applied Immune Sciences, Inc. and served initially as Vice President of Research and Development and then as chairman, chief executive officer and a director of Applied Immune Sciences, until 1995 when it was acquired by Rhone-Poulenc Rorer. Dr. Okarma was a Senior Vice President at Rhone-Poulenc Rorer from the time of the acquisition of Applied Immune Sciences until December 1996. From 1980 to 1992, Dr. Okarma was a member of the faculty of the Department of Medicine at Stanford University School of Medicine. Dr. Okarma holds a A.B. from Dartmouth College, a M.D. and Ph.D. from Stanford University and an executive M.B.A. from Stanford Graduate School of Business.

David L. Greenwood has served as our Chief Financial Officer, Treasurer and Secretary since August 1995 and our Executive Vice President since January 2004. He is also a director of our wholly-owned subsidiary, Geron Bio-Med Limited, our majority-owned subsidiary, TA Therapeutics, Ltd., ViaGen, Inc., an Arizona corporation, and Clone International, an Australian company. From August 1999 until January 2004, Mr. Greenwood also served as our Senior Vice President of Corporate Development. From April 1997 until August 1999, Mr. Greenwood served as our Vice President of Corporate Development. He also serves on the Board of Regents for Pacific Lutheran University. From 1979 until joining us, Mr. Greenwood held various positions with J.P. Morgan & Co. Incorporated, an international banking firm. Mr. Greenwood holds a B.A. from Pacific Lutheran University and a M.B.A. from Harvard Business School.

Stephen M. Kelsey, M.D., F.R.C.P., F.R.C.Path., has served as our as Executive Vice President and Chief Medical Officer, Oncology since April 2009. From June 2002 until April 2009, Dr. Kelsey held various positions at Genentech, Inc., most recently as vice-president, clinical hematology/oncology. From June 2000 to June 2002, Dr. Kelsey was the director of clinical affairs at Pharmacia Corporation (SUGEN, Inc.) in South San Francisco and director of global clinical development (oncology) at Pharmacia Corporation in Milan, Italy. From July 1987 to June 2000, Dr. Kelsey served variously as a senior lecturer in hematology/oncology at St. Bartholomews and the Royal London School of Medicine and Dentistry and visiting fellow at Vancouver General Hospital and Terry Fox Laboratories. Dr. Kelsey earned his B.Sc. in Pharmacology, M.B. Ch.B., F.R.C.P., F.R.C.Path., and Doctorate of Medicine (M.D.) degrees from the University of Birmingham in the United Kingdom. Dr. Kelsey is also Board certified in the European Union and British Columbia in Internal Medicine and Hematology/Oncology.

Fabio M. Benedetti, M.D., has served as our Senior Vice President, Oncology since January 2008. From April 2007 to January 2008, he served as Senior Vice President, Clinical Development Oncology. From 2005 to 2006, Dr. Benedetti was the Vice President of Medical Affairs for Onyx Pharmaceuticals Inc. From 2002 to 2005, he was Vice President of Global Medical Affairs for Millennium Pharmaceuticals. From 1999 to 2002, Dr. Benedetti held various management positions with the Oncology Global Marketing group at Bristol-Myers Squibb. He has been an attending clinical assistant with the division of gastrointestinal oncology at Memorial Sloan-Kettering Cancer Center and an Instructor at Cornell University Medical College. Dr. Benedetti holds a B.A. in biology from Brown University and an M.D. from Brown University Medical School.

David J. Earp, J.D. Ph.D., has served as our Senior Vice President of Business Development and Chief Patent Counsel since May 2004. He is also a director of our majority-owned subsidiary, TA Therapeutics, Ltd. and ViaGen, Inc., an Arizona corporation. From October 1999 until May 2004, Dr. Earp served as our Vice President of Intellectual Property. From 1992 until joining us in June 1999, Dr. Earp was with the intellectual property law firm of Klarquist Sparkman Campbell Leigh and Whinston, LLP. Dr. Earp holds a B.Sc. in microbiology from the University of Leeds, England, a Ph.D. from the biochemistry department of The University of Cambridge, England, and conducted postdoctoral research at the University of California at Berkeley/U.S.D.A. Plant Gene Expression Center. He received his J.D. from the Northwestern School of Law of Lewis and Clark College in Portland, Oregon.

Calvin B. Harley, Ph.D., has served as our Chief Scientific Officer since July 1996. From May 1994 until July 1996, Dr. Harley served as our Vice President of Research. From April 1993 until May 1994, Dr. Harley served as our Director, Cell Biology. From 1989 until joining us, Dr. Harley was an Associate Professor of Biochemistry at McMaster University, and from 1982 to 1989, was an Assistant Professor of Biochemistry at McMaster University. Dr. Harley was also an executive of the Canadian Association on Gerontology, Division of Biological Sciences from 1987 to 1991. Dr. Harley holds a B.S. from the University of Waterloo and a Ph.D. from McMaster University, and conducted postdoctoral work at the University of Sussex and the University of California at San Francisco.

Melissa A. Kelly Behrs has served as our Senior Vice President, Therapeutic Development, Oncology since January 2007. Ms. Behrs served as our Vice President of Oncology from January 2003 until January 2007. From April 2002 until January 2003, Ms. Behrs served as our Vice President of Corporate Development. From April 2001 until April 2002, Ms. Behrs served as our General Manager of Research and Development Technologies. Ms. Behrs joined us in November 1998 as Director of Corporate Development. From 1990 to 1998, Ms. Behrs worked at Genetics Institute, Inc., serving initially as Assistant Treasurer and then as Associate Director of Preclinical Operations where she was responsible for all business development, regulatory, and project management activities for the Preclinical Development function. Ms. Behrs received a B.S. from Boston College and an M.B.A. from Babson College.

Jane S. Lebkowski, Ph.D., has served as our Senior Vice President, Chief Scientific Officer, Regenerative Medicine since 2009 and Senior Vice President of Regenerative Medicine since January 2004. From August 1999 until January 2004, Dr. Lebkowski served as our Vice President of Regenerative Medicine. From April 1998 until August 1999, Dr. Lebkowski served as our Senior Director, Cell and Gene Therapies. From 1986 until joining us in 1998, Dr. Lebkowski served as Vice President, Research and Development at Applied Immune Sciences. In 1995, Applied Immune Sciences was acquired by Rhone-Poulenc Rorer, at which time Dr. Lebkowski was appointed Vice President, Discovery & Product Development. Dr. Lebkowski received a B.S. in chemistry and biology from Syracuse University and received her Ph.D. from Princeton University.

Katharine E. Spink, Ph.D., has served as our Vice President of Operations, Regenerative Medicine Programs since February 2009. From January 2008 until February 2009, Dr. Spink served as our Senior Director of Regenerative Medicine Program Operations. From January 2007 until January 2008, Dr. Spink served as our Program Director for Cardiovascular Disease. Dr. Spink joined Geron in December 2003, and served various roles within our Corporate Development group until January 2007. Prior to Geron, Dr. Spink was with the global management consulting firm McKinsey & Company, where she advised clients in the biotechnology, pharmaceutical, and medical device industries on matters relating to R&D strategy, business development, and marketing. Dr. Spink holds a B.A. in biochemistry from Rice University, and a Ph.D. in cancer biology from Stanford University.