President-elect Donald Trump filled out key defense and crypto policy roles in his next administration, making billionaire Stephen Feinberg official as the No. 2 at the Pentagon and picking Michael Kratsios to lead tech policy at the White House.

Trump will nominate Kratsios to lead the Office of Science and Technology Policy, a Senate-confirmed position. The managing director of Scale AI served in lower technology-related posts in the first Trump administration and has been helping to staff up the Department of Government Efficiency, the Elon Musk-driven initiative to downsize the federal government.