Leadership Team

Ed Mascioli, MD

Chief Executive Officer,



Kevin P. Killeen

Chief Scientific Officer

Daniel Geffken

Chief Financial Officer

Nicole Ruggiero

Head of Business Development

Robert T. Cartee

Vice President,  

Process Development

Kercine Elie

Head of Human Resources

Ann Thanawastien

Director, Preclinical Affairs

Thomas J. Griffin

Senior Director, Program Management

Peter A. Patriarca MD:

Dr. Patriarca is the Principal of Immuno-Vax, LLC, and a senior affiliate consultant with the Biologics Consulting Group, Inc. (Alexandria, Virginia), and has provided technical and regulatory consulting services for all phases of vaccine and drug development for the past 14 years for over 500 projects. Prior to consulting, Dr. Patriarca was Corporate Head and Vice President, Worldwide Regulatory Affairs and Pharmacovigilance at MedImmune, Inc. and also served as Medical Officer in the U.S. Public Health Service at the Centers for Disease Control and Prevention and the US Food and Drug Administration. At FDA, Dr. Patriarca served, among other positions, as Director of the Division of Viral Products in the Office of Vaccines Research and Review (OVRR), CBER. In that capacity, he oversaw research and review activities of more than 100 scientific staff in eight laboratories and was intimately involved with regulatory decisions and policy affecting vaccine development and licensure. While at CDC, Dr. Patriarca was assigned to the National Immunization Program, where, among other positions, he served as the Chief Medical Epidemiologist in the Influenza Division and the first head of CDC’s program in support of the Global Poliomyelitis Eradication Initiative. He has authored more than 100 peer-review publications and has served on multiple scientific advisory bodies for CDC, WHO, the Bill and Melinda Gates Foundation, the American Academy of Pediatrics, the National Academy of Sciences, and numerous pharmaceutical companies. Dr. Patriarca earned his doctor of medicine degree from Tulane University School of Medicine

David S. Fedson MD:

Dr. Fedson is former Professor of Medicine at University of Virginia School of Medicine and former Director of Medical Affairs at Aventis Pasteur MSD. His work has focused on adult immunization with influenza and pneumococcal vaccines.  Dr Fedson served on the Task Force on Adult Immunization of the American College of Physicians.  He served as a member of the Advisory Committee on Immunization Practices and as a member of the National Vaccine Advisory Committee, where he wrote a report on adult immunization.  His research has included the first large-scale study to show that influenza vaccination reduces all-cause mortality, studies that established the epidemiologic rationale for hospital-based vaccination and reports on the international macroepidemiology of influenza vaccination.  In 1995, Dr. Fedson joined the Medical Department of Aventis Pasteur MSD, a European vaccine company based in Lyon, France.  Six years later, he helped establish the Influenza Vaccine Supply International Task Force, which represents major vaccine companies concerned with the challenges of supplying vaccine for the next flu pandemic.  Dr. Fedson earned his doctor of medicine degree from Yale University.

Ciaran P. Kelly MD:

Dr. Kelly serves as Chief of the Herrman L. Blumgart Internal Medicine Firm. He serves as Director of Gastroenterology Training and Medical Director of the Celiac Center at Beth Israel Deaconess Medical Center, Boston, Massachusetts. Dr. Kelly also serves as a Member of Clinical and Scientific Advisory Board of Alvine Pharmaceuticals, Inc., a Member of Clinical & Scientific Advisory Board at ImmusanT, Inc., and a Member of Clinical Advisory Board at Synthetic Biologics Inc.. Dr. Kelly has longstanding clinical and research interests in intestinal infection and inflammation and has studied the pathogenesis and management of celiac disease for over 20 years. He serves as a Member of Scientific Advisory Board at Cour Pharmaceutical Development Company, Inc. He serves as an Associate Professor of Medicine at Harvard Medical School. Dr. Kelly is the Author of more than 150 clinical and basic research book chapters, invited reviews and peer-reviewed publications appearing in such journals as Infection & Immunity, American Journal of Physiology, Gastroenterology, Journal of Biological Chemistry, Journal of Clinical Investigation, The Lancet and New England Journal of Medicine. Dr. Kelly is a Fellow of the American College of Gastroenterology and a past Fellow of the Royal College of Physicians of Ireland. Dr. Kelly was a Foundation Scholar at Trinity College in Dublin, Ireland and recipient of numerous academic awards from it. Dr. Kelly earned his doctor of medicine degree from Trinity College in Dublin, Ireland. Dr. Kelly has also received postgraduate clinical and research awards from the Crohn's and Colitis Foundation of America, the American Gastroenterological Association and the National Institutes of Health.

Stephen Pelton MD:

Dr. Pelton is Professor of Pediatrics and Epidemiology at Boston University School of Medicine and Public Health and Director of Pediatrics Infectious Diseases at Boston Medical Center. He serves as a member of the American Academy of Pediatrics the Pediatric Infectious Diseases Society and the Infectious Diseases Society of America. He is a Fellow of the American Academy of Pediatrics. Dr. Pelton’s work is focused on the epidemiology of invasive pneumococcal and meningococcal disease and the pathogenesis and prevention of respiratory disease, specifically otitis media and pneumonia due to non-typable Haemophilus influenzae and Streptococcus pneumoniae. Dr. Pelton is a leading investigator in the management of pneumococcal infections and the impact of PCV on pneumococcal ecology in the pediatric population. He has reported on the risk features for pneumococcal disease in the current era of widespread PCV immunization; identifying that comorbid disease remains an important risk feature.  He has published on a broad array of topics including epidemiology of invasive pneumococcal and meningococcal infections, changing patterns of nasopharyngeal colonization and pathogenesis, and prevention of otitis media. Dr Pelton earned his doctor of medicine degree from University at Buffalo, School of Medicine and Biomedical Sciences.


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