US President-elect Donald Trump says Jamieson Greer will be his trade representative after he takes office on 20 January 2025.
The announcement came after Trump threatened new tariffs - which are taxes on imported items - on China, Canada and Mexico to get them to clamp down on the illegal flow of people and drugs to the US.
Greer, a trade lawyer, is a veteran of Trump's first presidency - during which he played a key role in imposing tariffs on goods from China.
This time, Greer would be involved in "reining in the country’s massive trade deficit, defending American manufacturing, agriculture, and services, and opening up export markets everywhere," Trump said in a statement.