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Leadership Biographies

Learn about the senior leaders guiding the Administration for Strategic Preparedness and Response (ASPR) in advancing the nation's health security and emergency preparedness.

  • John Knox

    john knox

    Principal Deputy Assistant Secretary for Preparedness and Response 
    HHS Administration for Strategic Preparedness and Response

  • Nikki Bratcher-Bowman

    bowman

    Deputy Assistant Secretary and 
    Chief Operating Officer 
    HHS Administration for Strategic Preparedness and Response

  • Mark P. O’Neill

    Mark ONeill

    Chief of Staff 
    Administration for Strategic Planning and Response

  • Makoto P. Braxton

    Makoto P. Braxton

    Acting Deputy Assistant Secretary and 
    Acting Director, Center for Administration 
    HHS Administration for Strategic Preparedness and Response

  • Brian Mazanec, PhD

    Brian Mazanec

    Deputy Assistant Secretary 
    Acting Director, Center for Preparedness
    Director, Center for the HHS Coordination Operations & Response Element 
    HHS Administration for Strategic Preparedness and Response

  • Jonathan N. Greene

    Jonathan N. Greene

    Deputy Assistant Secretary 
    Director, Center for Response 
    HHS Administration for Strategic Preparedness and Response

  • Gary L. Disbrow, PhD

    Gary Disbrow

    Deputy Assistant Secretary 
    Director, Center for the Biomedical Advanced Research and 
    Development Authority 
    HHS Administration for Strategic Preparedness and Response

  • Arlene Joyner, MS, PMP, CSSGB

    Arlene Joyner

    Deputy Assistant Secretary 
    Director, Center for Industrial Base Management and Supply Chain 
    HHS Administration for Strategic Preparedness and Response

  • Steven A. Adams, MPH

    Steve Adams, Deputy Assistant Secretary Center for the Strategic National Stockpile, HHS Administration for Strategic Preparedness and Response

    Deputy Assistant Secretary 
    Center for the Strategic National Stockpile 
    HHS Administration for Strategic Preparedness and Response