Jake Sullivan, formerly deputy assistant to the president under the Barack Obama administration, has received appointment as national security adviser to President-elect Joe Biden.
Sullivan is among the six key members of the incoming administration's foreign policy and national security team unveiled Monday.
His government career includes prior roles as director of policy planning at the State Department and deputy chief of staff to then-Secretary of State Hillary Clinton.
He also advised Biden on national security matters during the latter's tenure as U.S. vice president. Sullivan established and led the National Security Action nonprofit's advisory board, served as a senior fellow of the Carnegie Endowment for International Peace and held teaching stints at Dartmouth College, the University of New Hampshire and Yale Law School.
Tony Blinken, who previously advised both Obama and Biden on foreign policy concerns, is due to receive nomination as Secretary of State.
Alejandro Mayorkas, a former deputy secretary at the Department of Homeland Security, emerged as the nominee to lead DHS in the next administration.
Avril Haines, the CIA's former deputy director, will be nominated for the director of national intelligence position. She will be the intelligence community's first woman head if confirmed to the role.
Linda Thomas-Greenfield, who held a 35-year U.S. Foreign Service career, is Biden's pick for ambassador to the United Nations.
John Kerry, who led the State Department from 2013 to 2017, will concurrently serve as special presidential envoy for climate and a member of the National Security Council.