Since winning the 2020 presidential election, President-elect Joe Biden and Vice President-elect Kamala Harris have signaled that their cabinet and senior White House team would be among the most diverse in American history.

As the incoming team has begun to take shape in recent weeks, Biden and Harris have been living up to this expectation. On Monday, Biden announced that he had chosen retired four-star General Lloyd Austin to become Secretary of Defense. In remarks given on Wednesday during Austin's official introduction as a cabinet nominee, Vice President-elect Harris proclaimed that "General Austin reflects the very best of our nation."

If confirmed, Austin would be the first Black person to hold the post, one of the highest positions in the U.S. government. Next to choosing Senator Harris for vice president, Austin's nomination is the most consequential choice of a Black official for Biden's administration, and has become the most controversial so far.

Here are five things to know about the man who could soon occupy the top spot in the Pentagon.