Question: When was the American government official which took over from Thomas A. Shannon Jr. after he was confirmed born? 

Context paragraphs:
Martha S. Lewis: Martha S. Lewis (February 24, 1924 in Kensett, Arkansas – July 2, 2007 in Albany, New York) was an American government official and social worker.  She had a long career as a ground-breaking social worker in the metropolitan New York City area and elsewhere.  In the 1970s, she was the highest ranking African-American official in any state government, as a deputy commissioner for the Department of Social Services in the New York State government.  She was also a pioneer in the civil rights movement.

Mike Young (agriculture official): Michael L. Young is an American government official.  He served as the acting United States Secretary of Agriculture from January 20, 2017, when Donald Trump took office as President of the United States, to April 25, 2017, when the United States Senate confirmed Sonny Perdue as the new secretary.  Young has been director of the United States Department of Agriculture (USDA) Office of Budget and Policy Analysis since October 2010, and has served for 25 years in that office, and has previously served in other positions within the department.  He has a bachelor of science degree in botany from Colorado State University and a master of business administration degree from George Washington University.

Adam J. Sullivan: Adam J. Sullivan is an American government official.  Currently a staff member of the United States Senate Appropriations Subcommittee on Labor, Health and Human Services, and Education, he is President Donald Trump's nominee to become Assistant Secretary for Governmental Affairs in the United States Department of Transportation.  If confirmed, Sullivan will become the U.S. Department of Transportation's chief adviser on congressional relations.

Rex Tillerson: Rex Wayne Tillerson (born March 23, 1952) is an American government official, civil engineer, and former energy executive who is the 69th and current United States Secretary of State, serving since February 1, 2017.  Tillerson joined Exxon in 1975 and rose to serve as the chairman and chief executive officer (CEO) of ExxonMobil from 2006 to 2016.

Thomas Arthur Bisson: Thomas Arthur Bisson, who wrote as T. A. Bisson (b. New York City 1900-1979) was an American political writer, journalist, and government official who specialized in East Asian politics and economics.  In the 1920s and 1930s he worked for the Foreign Policy Association, the Institute for Pacific Relations and wrote sympathetically about the Communist movement in China.  He served in the American government during World War II, then was an officer in the Occupation of Japan.  He taught at University of California, Berkeley in the early 1950s, but was let go after he came under criticism for his left-wing views and accusations that he had been a wartime spy for the Soviet Union.

Edward J. Collins, Jr.: Edward J. Collins, Jr. was an American government official for the state of Massachusetts, the town of Saugus and the city of Boston.  He is the namesake of the Edward J. Collins, Jr.  Center for Public Management at the University of Massachusetts Boston.

Elaine McCusker: Elaine A. McCusker is an American government official who currently serves as United States Principal Deputy Under Secretary of Defense comptroller in the United States Department of Defense.  She was previously the resources and analysis director at United States Central Command.  She was nominated by President Donald Trump to become United States Principal Deputy Under Secretary of Defense in April 2017 and was confirmed on August 1, 2017.

United States Ambassador to Somalia: The United States Ambassador to Somalia is the most senior diplomatic representative of the United States federal government assigned to Somalia.  The U.S. maintains a non-resident diplomatic mission in Nairobi for Somalia and its constituent autonomous regions.  In January 2013, a senior American government official indicated that the United States could eventually reopen its embassy in Mogadishu, which had closed in the early 1990s.  In June 2014, the U.S. State Department also announced that it would soon name a new ambassador to Somalia.  In February 2015, the U.S. government nominated its first official ambassador since 1991.

Brian D. Montgomery: Brian Darrell Montgomery (born August 2, 1956) is an American government official.  He served as Assistant Secretary of Housing and Urban Development for Housing within the United States Department of Housing and Urban Development during the administration of George W. Bush.  He was confirmed to the position in February 2005 and resigned in July 2009.  Currently a partner at business consulting firm Collingwood Group, LLC, he has been nominated by President Donald Trump to return to his former position as Assistant Secretary of Housing and Urban Development for Housing.

Thomas A. Shannon Jr.: Thomas Alfred "Tom" Shannon Jr. (born 1958) is an American diplomat and the current Under Secretary of State for Political Affairs.  In early 2017, Shannon served as acting United States Secretary of State until President Donald Trump's nominee, Rex Tillerson, was confirmed.  He was also acting Deputy Secretary of State of the United States until the Senate confirmed President Trump's nominee, John J. Sullivan.

Supporting paragraphs: Thomas A. Shannon Jr. Rex Tillerson
Answer: March 23, 1952