Clinton is a veteran of both public service and the private sector . Koskinen , May , headed Freddie Mac and served in the Clinton administration . If confirmed by the IRS , he succeed acting IRS head John Koskinen . Werfel was appointed in May amid the Freddie Mac targeting controversy .
John Koskinen is a veteran of both public service and the private sector . Koskinen , 74 , headed Freddie Mac and served in the Clinton administration . If confirmed by the Senate , he succeed acting IRS head Daniel Werfel . Werfel was appointed in May amid the IRS targeting controversy .