The rap sheet for members of the International Union of Operating Engineers reads like something out of “Goodfellas.”

Embezzlement. Wire fraud. Bribery. That’s just scratching the surface of crimes committed by the IUOE ranks. And it is from this union that President Obama earlier this year picked one of his latest appointees to the National Labor Relations Board, the federal agency tasked with resolving labor disputes between unions and management.

That recess appointee, Richard Griffin, was former general counsel for the 400,000-member union of heavy equipment operators — a union tainted over the years by mob connections and a history of corruption.