Brigadier General Thomas Sidney Jesup (1788–1860) was an American military officer known as the "Father of the Modern Quartermaster Corps". He began his military career in 1808, and served in the War of 1812. He was appointed Quartermaster General on May 8, 1818, and held it until his death. While in this position, he saw combat during the wars against the Creeks, the Seminoles, and Mexico.