President-elect Donald Trump on Tuesday named Jason D. Greenblatt, his longtime business lawyer, to a newly created position of special representative for international negotiations.

In a statement, Trump said that he had asked Greenblatt, who serves as executive vice president and chief legal officer of the Trump Organization, to assist him “with international negotiations of all types, and trade deals around the world.”

Trump said that Greenblatt has a history of negotiating “substantial, complex transactions” and expertise in bringing parties together on sensitive topics.

During the campaign, Greenbelt, a pro-Israel activist, also served as one of Trump’s closest advisers of U.S.-Israeli relations.

It was not immediately clear if Greenbelt would be stationed in the White House or one of the Cabinet agencies or how his role would interact with others tasked with overlapping responsibilities, such as the U.S. trade representative.

In a statement, Greenblatt, who has known Trump for two decades, thanked him for the appointment and said his philosophy “in both business and in life, is that bringing people together and working to unite, rather than to divide, is the strongest path to success.”