The administrator of the Environmental Protection Agency is the head of the United States Environmental Protection Agency (EPA),and is thus responsible for enforcing the nation's Clean Air and Clean Water Acts,as well as numerous other environmental statutes. The administrator is nominated by the president of the United States and must be confirmed by a vote of the Senate.
The Office of the Secretary of Defense (OSD) is a headquarters-level staff of the United States Department of Defense. It is the principal civilian staff element of the U.S. Secretary of Defense,and it assists the Secretary in carrying out authority,direction and control of the Department of Defense in the exercise of policy development,planning,resource management,fiscal,and program evaluation responsibilities. OSD is the Secretary of Defense's support staff for managing the Department of Defense,and it corresponds to what the Executive Office of the President of the U.S. is to the U.S. president for managing the whole of the Executive branch of the federal government.
Linda Thomas-Greenfield is an American diplomat who serves as the United States ambassador to the United Nations under President Joe Biden. She served as the U.S. assistant secretary of state for African affairs from 2013 to 2017. Thomas-Greenfield then worked in the private sector as a senior vice president at business strategy firm Albright Stonebridge Group in Washington,D.C.
Lynne M. Tracy is an American diplomat who is the United States ambassador to Russia,serving since January 2023. She formerly served as the United States ambassador to Armenia from 2019 to 2022.
Adewale O. "Wally" Adeyemo is an American government official serving as the United States deputy secretary of the treasury. He was the first president of the Obama Foundation and also served during the Obama administration as the deputy national security advisor for international economics from 2015 to 2016 and deputy director of the National Economic Council.
Joe Biden assumed office as President of the United States on January 20,2021. The president has the authority to nominate members of his Cabinet to the United States Senate for confirmation under the Appointments Clause of the United States Constitution.
