Dr. Rose was elected Chairman of the Board of SIGA in January 2007. On March 1, 2007, Dr. Rose became the Company's Chief Executive Officer after taking leave from his position as Chairman of the Department of Surgery and Surgeon-and-Chief of the Columbia Presbyterian Center of New York Presbyterian Hospital, a position he held since August 1994. Dr. Rose has been a member of the Board of Directors of SIGA since April 2001 and served as Interim Chief Executive Officer during April-June 2001. Dr. Rose is a past President of the International Society for Heart and Lung Transplantation. Dr. Rose is also Morris & Rose Millstein Professor of Surgery at Columbia University's College of Physicians and Surgeons` Department of Surgery. Dr. Rose also serves as a Director of Abiomed, Inc., Nephros, Inc. and Keryx Biopharmaceuticals, Inc. Dr. Rose is a graduate of both Columbia College and the Columbia University College of Physicians & Surgeons. In addition to his new roles at SIGA, Dr. Rose has become Executive Vice President – Life Sciences at MacAndrews & Forbes Holdings Inc., a SIGA shareholder.

James J. Antal has been an active consultant and founding investor in several Southern California based emerging companies, including serving as Chief Financial Advisor to Black Mountain Gold Coffee Co., since his retirement in 2002. Mr. Antal was the Chief Financial Officer and Chief Investment Officer from 1996 to 2002 for Experian, a $1.6 billion global information services subsidiary of UK-based GUS plc. Prior to the GUS acquisition of Experian (the former TRW Inc. Information Systems and Services businesses) Mr. Antal held various finance positions with TRW from 1978 to 1996, including Senior VP of Finance for TRW Information Systems and Services and TRW Inc. Corporate Director of Financial Reporting and Accounting. He earned his undergraduate degree in accounting from The Ohio State University in 1973, and became a certified public accountant (Ohio) in 1974. He engaged in active practice as a CPA with Ernst & Ernst until 1978. Mr. Antal has served as a director of First American Real Estate Solutions, an Experian joint venture with First American Financial Corp. Mr. Antal has been a director since January 2004.

Thomas E. Constance has served as a director of SIGA since April 2001. Mr. Constance is Chairman and, since 1994, a partner of Kramer Levin Naftalis & Frankel LLP, a law firm in New York City, which SIGA has retained to provide legal services. Mr. Constance serves as a Trustee of the M.D. Sass Foundation and St. Vincent's Services. He also serves on the Advisory Board of Directors of Barington Capital, L.P.

Steven L. Fasman has served as a director since May 2007. He has been Senior Vice President-Law at MacAndrews & Forbes Holdings Inc. since 2004. Prior to that, he served as Vice President-Law at MacAndrews & Forbes during 1998-2003 and Senior Counsel at MacAndrews & Forbes during 1992-1997. From 1987 to 1992, he was associated with Paul, Weiss, Rifkind, Wharton & Garrison.

Scott M. Hammer, M.D. is the Harold C. Neu Professor of Medicine, Professor of Epidemiology and Chief of the Division of Infectious Diseases at the Columbia University Medical Center (CUMC). Dr. Hammer is also the Chair of the AIDS Vaccine Research Working Group, an advisory committee to the Division of AIDS at the NIAID, and had also served as the Chair of the Antiviral Products Advisory Committee of the FDA. In his role as Chief of the Division of Infectious Diseases at CUMC, he has worked to enhance professional development and has focused on strengthening infection surveillance at the institutional and regional levels in order to improve and protect public health. Dr. Hammer has been a director since December 2006.

Adnan M. Mjalli, Ph.D. has served as a director of SIGA since January 2004. Dr. Mjalli founded TransTech Pharma, Inc., a privately held drug discovery company in High Point, North Carolina, in 1999 and has since served as its President and Chief Executive Officer. He also serves as Chairman of the Board of PharmaCore, Inc., where he previously served as President and CEO from December 1998 to November 2000. Dr. Mjalli obtained his Ph.D. in medicinal chemistry in 1989 from the University of Exeter, UK. He conducted postdoctoral work at the University of Rochester. Prior to founding TransTech Pharma, he held various positions of increasing responsibility in research and senior management at several pharmaceutical and biotechnology companies including Merck & Co., Inc.

Mehmet C. Oz, M.D. has served as a director of SIGA since April 2001. Dr. Oz has been a cardiac surgeon at Columbia University's Presbyterian Hospital since 1993 and a Professor of Surgery and Vice Chairman for Cardiovascular Services of the Department of Surgery there since July 2001. Dr. Oz also directs the following programs at New York Presbyterian Hospital: the Cardiovascular Institute, the complementary medicine program, the clinical perfusion program and clinical trials of new surgical technology. Dr. Oz received his undergraduate degree from Harvard University in 1982, and, in 1986, he received a joint M.D./M.B.A. degree from the University of Pennsylvania Medical School and the Wharton School of Business.

Paul G. Savas has served as a director of SIGA since January 2004. Mr. Savas is Executive Vice President and Chief Financial Officer of MacAndrews & Forbes Holdings Inc. He joined the company in 1994 as Director of Corporate Finance, served the Company in various positions of increasing responsibility and became Chief Financial Officer in 2007. He also serves as Executive Vice President and Chief Financial Officer of M & F Worldwide Corp. and sits on the boards of Harland Clarke Holdings Corp. and TransTech Pharma, Inc.

Judy S. Slotkin was Co-Head of the Finance Committee of the Modern Africa Fund, a $120 million private equity fund, from 1998 until 2003. Ms. Slotkin was formerly Department Head in the Corporate Finance Division of Citigroup (Citibank Investment Bank) where she was responsible for various businesses and the first head of the group's Capital Markets Desk. Prior to that, Ms. Slotkin held various positions in the Citigroup (Citibank) commercial bank. Ms. Slotkin is also a founding member of the Food Allergy Initiative, an organization funding research, legislative initiatives and education regarding food allergies. Ms. Slotkin received her undergraduate degree in accounting from Fairleigh Dickinson University in 1976 and, in 1980, she received her MBA in Finance from Fordham University. Ms. Slotkin has been a director since January 2004.

Michael A. Weiner, M.D. has served as a director of SIGA since April 2001. Dr. Weiner is the Hettinger Professor of Pediatrics at Columbia University College of Physicians and Surgeons since 1996. Dr. Weiner is also the Director of Pediatric Oncology at New York Presbyterian Hospital. Dr. Weiner was a director of Nexell Therapeutics, Inc. (f/k/a VimRx) from March 1996 to February 1999. Dr. Weiner is a 1972 graduate of the New York State Health Sciences Center at Syracuse, and he was a post-graduate student at New York University and Johns Hopkins University.