(Bloomberg) -- President-elect Donald Trump’s transition team is readying an announcement of Jamieson Greer as US Trade Representative, according to people familiar with the matter.

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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 US.

A longtime protégé of Robert Lighthizer, who served four years as Trump’s US 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. On Monday, Trump said he intended to impose 25% levies on all imports from Canada and Mexico and an additional 10% on Chinese goods, roiling markets with his first specific threats on top trading partners since winning the presidency three weeks ago.

The appointment won’t become final until announced by Trump. Greer did not immediately respond to requests for comment.

“President-Elect Trump has made brilliant decisions on who will serve in his second administration at lightning pace,” said Karoline Leavitt, a Trump-Vance transition spokeswoman. “Remaining decisions will continue to be announced by him when they are made.”

Greer served as Lighthizer’s chief of staff during the first term and also worked for him at the law firm Skadden, Arps, Slate, Meagher & Flom LLP.

If confirmed by the Senate, Greer at the helm of the Office of the US Trade Representative will be in charge of implementing tariff policy and negotiating trade agreements. The cabinet-level role that’s part of the executive office of the president is usually overshadowed by bigger agencies like the Commerce and Treasury departments.

Greer was intimately involved in Trump’s first-term trade policy decisions, including the steep duties on China and the negotiations for a partial trade deal that was concluded shortly before the outbreak of the coronavirus pandemic.

Earlier: What Trump’s New Tariff Push Means for the Economy: QuickTake

In testimony before the US-China Economic and Security Review Commission in May, Greer said that countering China’s trade policies amounted to a “generational challenge” to the country.