The ClearPath Vaccines Team

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George Siber, MD

More than 35 years developing vaccines and therapeutic programs for infectious diseases

  • Director of Massachusetts Public Health Biologic Laboratories which developed precursor to Synagis (>$1B sales)
  • EVP/CSO Wyeth which developed Prevnar (now >$6B sales), Meningitec, Rotashield and FluMist
  • Previously was Associate Professor at Harvard Medical School
  • Recipient of 2016 Sabin Gold Medal Award
  • Advisory Committees: WHO, NIH, Gates Foundation




Donna Ambrosino, MD

More than 30 years developing vaccines and biologics for infectious diseases

  • CEO of MassBiologics where she invented and developed monoclonal antibodies for C. Difficile, Rabies, and HCV (Zinplava and Rabishield now licensed products)
  • Previously was Associate Professor at Harvard Medical School and Professor of Pediatrics at UMass Medical School
  • Author of over 90 publications and multiple patents
  • Advisory Committees/Study Sections : WHO, NIH



Mark Leney

Mark Leney, PhD

Over 10 years of experience in the development, manufacturing, testing and clinical trials of both investigational and commercial vaccine and biologic products

  • PhD from the University of Cambridge (Mathematical and Evolutionary Biology & Anthropology)
  • Has been responsible for managing Validation, Clinical Data Management, Quality Control, Regulatory Affairs and Quality Assurance functions
  • Previously, was an Assistant Professor of Medicine at the University of Massachusetts Medical School, Adjunct Professor of Forensic Biology at Chaminade University of Honolulu, and Faculty at the University of Oxford



Francis J. Michon, PhD

Francis J. Michon, PhD

Over 25 years of experience developing vaccines to prevent serious infectious diseases

  • PhD in organic chemistry from the University of Grenoble (France)
  • While at the National Research Council of Canada was an inventor of the conjugation platform technology which led to a new class of safer and more potent bacterial vaccines for pediatric and adult populations
  • Held senior positions at North American Vaccine and Baxter Vaccines where he worked on the development and licensure of the meningococcal C conjugate vaccine, NeisVac-C™ which has generated global sales of over $2B
  • Dr. Michon is an author/co-author of over 80 publications and an investor on over 40 patients




Chuck Finn, PhD

More than 30 years of product development and regulatory experience covering a wide range of product types and therapeutic indications. Experience includes FDA – CBER, biopharma and CRO industry

  • RRD International, Co-Founder, Chairman and CEO, oversees RRD’s development partnerships, managed development teams in Symphony Capital partnership; established ClearPath vaccine development partnership with Astellas Pharma
  • Quintiles, SVP/head of therapeutic business units comprising infectious diseases/immunology/allergy/respiratory/ dermatology, and medical device business units for the US
  • Genetics Institute, Director of Regulatory Affairs, responsible for several clinical stage regulatory programs
  • Miles/Bayer, Associate Director of Regulatory Affairs, responsible for anti-infective regulatory programs
  • Praxis Biologics/Lederle, Sr. Scientist, Director Regulatory Affairs, Praxis developed first Haemophilus b conjugate vaccine for infants (acquired by Lederle for $238M)
  • Staff Fellow, FDA, CBER, Division of Bacterial Products (Vaccines)




Neil Sandler, MBA

Over 30 years of investment and finance experience including > $1B in biopharma development

  • Symphony Capital co-founder and Partner
  • Behrman Capital, Partner. Head of Healthcare
  • Robertson Stephens, Partner, Head of Healthcare
  • PaineWebber Development Corp., Managing Director; Director of product development investments including those with approved products for Amgen, Sanofi/Genzyme, and J&J/Centocor
  • Managed over 125 financings and M&A’s exceeding $13B




Patrick Frenchick, PhD

27 years of R&D experience in vaccine and biopharma development; led adjuvant and vaccine delivery technology development at Lederle/Wyeth, Pfizer, and SmithKline Animal Health; Led Vaccine strategy/evaluation team at Boehringer Ingleheim Vetmedica; NSF Postdoc in Virology (Baylor)