President-elect Donald Trump’s transition team is readying an announcement of Jamieson Greer as U.S. trade representative, according to people familiar with the matter.

Greer’s selection highlights the central role tariffs will play in Trump’s economic agenda with the incoming president vowing to use trade policy to raise revenue for the federal government and to pressure companies to reshore manufacturing jobs to the U.S.

A longtime protege of Robert Lighthizer, who served four years as Trump’s U.S. trade representative and oversaw billions in tariffs on both allies and adversaries, such as China, Greer is expected to play a pivotal role in implementing the president-elect’s plans.