U.S. President-elect Donald Trump on Tuesday named Jamieson Greer his trade representative, a key figure in implementing his economic agenda, particularly plans to use tariffs to raise revenue and help bring more manufacturing to U.S. shores.

Trump also picked Kevin Hassett as his top economic adviser, bringing the member of his first administration to head the White House National Economic Council. Hassett is set to help advance Trump's plans, too, ranging from tax cuts to widening energy production.

"Jamieson played a key role during my First Term in imposing Tariffs on China and others to combat unfair Trade practices," said Trump of Greer, who served as chief of staff to U.S. Trade Representative Robert Lighthizer during Trump's previous administration.