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About Us


Vijay B. Samant, President and Chief Executive Officer

Vijay B. Samant joined us as President and Chief Executive Officer in November 2000. Mr. Samant has 23 years of diverse U.S. and international sales, marketing, operations, and business development experience with Merck. From 1998 to mid-2000, he was Chief Operating Officer of the Merck Vaccine Division. From 1990 to 1998, he served in the Merck Manufacturing Division as Vice President of Vaccine Operations, Vice President of Business Affairs, and Executive Director of Materials Management. Mr. Samant earned a master's degree in management studies from the Sloan School of Management at the Massachusetts Institute of Technology in 1983. He received a master's degree in chemical engineering from Columbia University in 1977 and a bachelor's degree in chemical engineering from the University of Bombay, University Department of Chemical Technology, in 1975. Mr. Samant was a member of the Board of Directors for Raptor Pharmaceutical from 2011 to 2014, and was a member of the Board of Directors for BioMarin Pharmaceutical from 2002 to 2004. Mr. Samant was a Director of the Aeras Global TB Vaccine Foundation (Rockville, MD) from 2001 to 2010; a member of the Board of Trustees for the National Foundation for Infectious Diseases (NFID, Bethesda, MD) from 2003 to 2012; and a member of the Board of Trustees for the International Vaccine Institute (IVI, Seoul, Korea) from 2008 to 2012.

Mammen P. "Anza" Mammen, Jr., M.D., Vice President, Clinical Vaccines

Mammen P. “Anza” Mammen, Jr., M.D., joined us as Vice President, Clinical Vaccines in November 2012. Prior to joining Vical, Dr. Mammen retired as a colonel after a 21-year career in the Army Medical Corps, most recently as Infectious Disease Consultant and Chief, Pandemic Warning Team, U.S. Department of Defense. From 2006 to 2010, he served as the Army’s Product Manager for vaccines in Advanced Development against dengue, hepatitis E, and HIV viruses for the U.S. Army Medical Research and Materiel Command (USAMRMC). He was Chief, Department of Virology, the Armed Forces Research Institute of Medical Sciences (AFRIMS), Thailand, from 2001 to 2006 when he managed U.S. Food and Drug Administration-regulated vaccine field studies. His previous assignments include serving as Infectious Disease Officer, Walter Reed Army Institute of Research (WRAIR), and Chief, Internal Medicine Clinic, 121st General Hospital, Seoul, South Korea. Dr. Mammen received his M.D. degree from the Pennsylvania State University College of Medicine and is Board-certified in Infectious Diseases. He has been elected as Fellow by the Infectious Disease Society of America (IDSA) and the American College of Physicians (ACP). He received his Internal Medicine and Infectious Disease clinical training from the Walter Reed Army Medical Center. He earned a B.A. degree in mathematics from Williams College.

Larry R. Smith, Ph.D., Vice President, Vaccine Research

Larry R. Smith, Ph.D., joined us as Executive Director, Vaccinology in September 2003, and was named Vice President, Vaccine Research in October 2006. Dr. Smith was Director of Viral Vaccines Research at Wyeth Vaccines, where he oversaw the immunogenicity testing of various viral vaccines including a number of recombinant viral vectors. Prior to joining Wyeth in 1996, Dr. Smith was a Scientific Investigator at Immune Response Corporation, where he identified autoreactive T cell targets in psoriasis and multiple sclerosis which led to the clinical testing of several therapeutic vaccine candidates. Dr. Smith received a B.S. degree in Biology from Purdue University, a Ph.D. in Microbiology and Immunology from the University of Texas Medical Branch, and was a postdoctoral fellow in the Immunology Department at Scripps Clinic and Research Foundation.

Anthony A. Ramos, Vice President Finance, Chief Accounting Officer

Anthony A. Ramos joined us as Corporate Controller in February 2005 and was named Chief Accounting Officer in July 2010. From January 1999 until joining Vical, Mr. Ramos held various positions at Copper Mountain Networks, Inc., a publicly held network communications company, most recently as Vice President of Finance with broad responsibilities in finance, accounting, treasury, risk management and corporate governance. From April 1996 until joining Copper Mountain Networks, Inc., Mr. Ramos was Accounting Manager at Viasat, Inc., a publicly held digital communications company, where he held accounting and financial reporting responsibilities. From January 1990 until joining Viasat, Inc., Mr. Ramos served as an audit manager at PricewaterhouseCoopers LLP, where his clients included life sciences, computer software and telecommunications companies as well as government contractors. Mr. Ramos received his bachelor’s degree in business administration and accounting from San Diego State University and is a Certified Public Accountant.
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