On April 9th, President Biden announced Doug Parker is his nominee to lead OSHA, replacing Acting Assistant Secretary of OSHA Loren E. Sweatt . From the official announcement (link below)

Doug “previously served in the Obama Administration as Deputy Assistant Secretary for Policy in the Department of Labor’s Mine Safety and Health Administration, and was a member of the Biden-Harris transition team focused on worker health and safety issues. He also held positions as a senior policy advisor and special assistant at the Department of Labor. He currently serves as chief of California’s Division of Occupational Safety and Health (Cal/OSHA)”.

President Biden Announces his Intent to Nominate Key Members for the Department of Veterans Affairs, Department of Labor, Department of Energy, and Department of Transportation | The White House

Other OSHA leaders include Chief of Staff Leah Ford (2/16/2021), Principal Deputy Assistant Secretary James Frederick (1/28/2021), Deputy Assistant Secretary for Pandemic and Emergency Response Joseph Hughes, Jr. (1/28/2021), and Deputy Assistant Secretary Amanda Edens (4/1/2021).  OSHA’s administrative organization chart is available at https://www.osha.gov/sites/default/files/OSHAorgchart.pdf.