President-elect Donald Trump faces many decisions as he prepares to become president January 20. Among the biggest is selecting the men and women who will fill his administration.

Trump has already named a few key advisers, including his chief of staff, Reince Priebus, and Jeff Sessions, a U.S. senator from Alabama, for attorney general. He also selected South Carolina Governor Nikki Haley as U.S. ambassador to the United Nations.

But President-elect Trump still has the rest of his Cabinet to fill. A president’s Cabinet includes the vice president and the heads of executive departments. The president also can give other officials Cabinet rank. Cabinet-level positions require confirmation by the U.S Senate.

Here is a look at when past presidents and President-elect Trump announced their picks for the highest-profile posts. This infographic will be updated as Trump’s Cabinet selections are named.

Timeline of key Cabinet nominations

Infographic: Timeline of key Cabinet positions (State Dept./J. Maruszewski)
(State Dept./J. Maruszewski)