Dan R. Brouillette (born August 18, 1962) is an American businessman. He was the 15th United States Secretary of Energy from December 3, 2019 to January 20, 2021. He was the United States Deputy Secretary of Energy from August 2017 through December 2019. After being nominated for the position by President Donald Trump, Brouillette was confirmed by a 79–17 vote of the United States Senate on August 3, 2017.