Wikipedia (en)
Mark Thomas Esper (born April 26, 1964) is a former American corporate executive and military veteran serving as acting United States secretary of defense. He served as the 23rd United States secretary of the Army from 2017 to 2019. Prior to his current position, he served as vice president of government relations at Raytheon, a major U.S. defense contractor. During his time at Raytheon, Esper was recognized as a top corporate lobbyist by The Hill in 2015 and in 2016.President Donald Trump announced on June 18, 2019, that Esper would become acting secretary of defense, succeeding acting secretary Patrick Shanahan. Before Shanahan withdrew his name from consideration for the position, Esper had been considered a leading candidate for the nomination, had the Senate declined to confirm Shanahan. Esper assumed the office on June 24, and Trump intends to nominate him to serve in a permanent capacity. While Esper is serving as acting defense secretary, he will technically retain the title of Secretary of the Army.