Richard Rubin writes Koskinen will serve a four-year term through November 2017 and becomes the agency’s first confirmed leader within the past full year.
Office of Management and Budget Director Danny Werfel has led the IRS since May after then-acting commissioner Steven Miller resigned.
Reuters reports that Koskinen will begin his role at the IRS in January, when the agency is set to start processing nearly 240 million tax returns and implementing portions of the Affordable Care Act.