She had previously held the post of Assistant Secretary for Nonproliferation and National Security , also at the Department of Energy ( DOE ) .
Gottemoeller was formerly the Deputy Under Secretary of Energy for Defense Nuclear Nonproliferation at the U.S Department of Energy .
Gottemoeller had previously held the post of Assistant Secretary for Nonproliferation and National Security , also at the Department of Energy ( Department of Energy ) .
Gottemoeller was formerly the Deputy Under Secretary of Energy for Defense Nuclear Nonproliferation at the U.S Department of Energy .