Biden Picks Former F.D.A. Chief to Lead Federal Vaccine Efforts January 15, 2021 Auto Bot Appointments and Executive Changes, Biden, Joseph R Jr, Food and Drug Administration, Kessler, David A, Operation Warp Speed, Presidential Transition (US), Vaccination and Immunization 0 Dr. David Kessler, who helped speed the development and approval of AIDS drugs in the 1990s, will become the top science official at Operation Warp Speed.