Biden has reportedly chosen his U.N. ambassador, national security adviser

President-elect Joe Biden is expected to announce Linda Thomas-Greenfield as his nominee for ambassador to the United Nations and Jake Sullivan as his national security adviser, several people familiar with the matter told The Washington Post.

Thomas-Greenfield spent 35 years in the Foreign Service, retiring in 2017. She served as assistant secretary of state for African affairs and was ambassador to Liberia during the Obama administration. She is now a senior counselor with the Albright Stonebridge advisory firm.

Sullivan was one of Biden's national security advisers during his time as vice president and was also a deputy chief of staff to Hillary Clinton when she was secretary of state. Antony Blinken, Biden's reported pick to be his secretary of state nominee, also served as one of Biden's national security advisers while vice president.

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