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Leadership

Executive Biographies

  • Christopher J. Williamson

    ASSISTANT SECRETARY OF LABOR MINE SAFETY AND HEALTH ADMINISTRATION

    Christopher J. Williamson, MSHA’s new Assistant Secretary, was appointed by President Biden, effective Monday, April 11, 2022. 

  • Julie E. Aaronson

    DEPUTY ASSISTANT SECRETARY FOR POLICY

    Julie E. Aaronson began serving as MSHA’s Deputy Assistant Secretary for Policy on August 14, 2023.

  • Patricia W. Silvey

    DEPUTY ASSISTANT SECRETARY FOR OPERATIONS

    Patricia W. Silvey was appointed Deputy Assistant Secretary for Operations in December 2010.