E.P.A. Administrator Michael Regan to Depart at End of December NYT | Top Stories By: Lisa Friedman 21 December 2024 at 02:37 Mr. Regan informed agency employees that he would leave before the formal end of the Biden term. © Pete Kiehart for The New York TimesMichael S. Regan is credited with helping to restore morale, staffing levels and scientific integrity at the agency.