Who: Todd Park, 41
Previous position: Park has been the White House chief technology officer since March 2012. In that role, he was credited with helping save HealthCare.gov after its rocky rollout. Before moving to his White House position, he had been HHS' CTO since 2009.
New roles: Park will be moving to California to help the federal government recruit technology talent, which some experts see as a critical void. They argue the feds don't have enough highly skilled technology staff to support key governmental functions.