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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