Archives: Our Team


  • Steven Lo

    Steven Lo

    Mr. Lo is a highly experienced biopharma executive with over 25 years of experience in the healthcare, biotechnology, and pharmaceutical industries, including over 12 years of C-level experience in publicly traded biotech companies. Prior to Vaxart, Mr. Lo was Chief Executive Officer and a member of the board of directors of Valitor, a private biotech…

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  • Sean Tucker, Ph.D.

    Sean Tucker, Ph.D.

    Dr. Tucker is the Founder of Vaxart and has served as its Chief Scientific Officer since February 2010. From March 2004 to February 2010, Dr. Tucker served as Vice President of Research and Director of Immunology. He has held numerous scientific and engineering roles at various biotechnology companies. Dr. Tucker has a BSc. in Chemical…

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  • James F. Cummings, M.D.

    James F. Cummings, M.D.

    Dr. Cummings is a Board-Certified Infectious Diseases Physician with a twenty-six-year career in the US Army and a proven track record in vaccine, drug, and diagnostics development. Dr. Cummings served as Director of the Department of Defense’s Global Emerging Infectious Surveillance and Response System (GEIS), with Bio-surveillance Laboratories in 71 countries, the Director of Translational…

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  • Raymond D. Stapleton, Jr., Ph.D.

    Raymond D. Stapleton, Jr., Ph.D.

    Dr. Stapleton served as Chief Technical Officer and Executive Vice President at Genocea, working to develop next generation personalized immunotherapies in the forms of vaccines and cell therapies. He joined Genocea in January 2021, bringing more than 20 years of industry experience to the company, having led technical, quality, and manufacturing operations at commercial and…

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  • Jeroen Grasman

    Jeroen Grasman

    Mr. Grasman brings more than 20 years of financial leadership experience in the biotechnology industry. He most recently served as Chief Financial Officer at AltruBio, a clinical-stage private biotech company, from August 2021 to May 2025. During his tenure at AltruBio, Mr. Grasman led finance and operations and helped scale the company for global clinical studies. Before that, Mr. Grasman served as Vice…

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  • Edward B. Berg

    Edward B. Berg

    Mr. Berg has served in senior legal positions at prominent healthcare companies for most of his more than 30-year career and has represented Fortune 500 and mid-cap companies in biotechnology, pharmaceuticals, and life sciences.  Prior to Vaxart, he served as Vice President, Deputy General Counsel for BioMarin Pharmaceutical Inc. Mr. Berg previously served as Vice…

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  • Laurie Hastings

    Laurie Hastings

    Ms. Hastings is a highly experienced HR executive with over 25 years of experience in both biotech and high-tech industries. Prior to joining Vaxart, Ms. Hastings was Vice President of People and Culture at Encoded Therapeutics, a private preclinical gene therapy company, from 2022 to 2023. From 2017 to 2022, she was the Vice President…

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