President-elect Donald Trump has chosen New York developers Richard LeFrak and Steven Roth—of the LeFrak Organisation and Vornado Realty Trust, respectively—to spearhead his $1 trillion infrastructure plan.

The developer duo, known for being chums with Trump, will be in charge of a council of around 20 builders and engineers. (Interestingly, no other job titles were listed). Unsurprisingly, though, specifics on what LeFrak and Roth will actually do have not been disclosed. However, Trump tried to reassure doubters when speaking to the Wall Street Journal. “They’re pros,” he said. “That’s what they do. All their lives, they build. They build under-budget, ahead of schedule.”

During his election campaign last year, Trump’s economic advisors Wilbur Ross and Peter Navarro outlined a $1 trillion infrastructure plan. Their scheme would be privately funded and supposedly allow for $137 billion in tax cuts. As reported by The Real Deal, LeFrak and Roth are both very good friends with the President-elect. “LeFrak was at one time the only personal friend allowed to bring his dogs to Trump’s Mar-a-Lago estate in Palm Beach, and Roth, who co-owns 1290 Sixth Avenue with Trump, has a relationship with the president-elect that dates back to the 1980s.”

There are no clear past historical precedents for LeFrak and Roth’s role. Trump has tapped Elaine Chao, U. S. Secretary of Labor from 2001 to 2009, among other government leadership roles, to lead the Department of Transportation.