Agency Head or Head of the Agency means -

(1) For the Department of Energy (DOE) -

(i) The Secretary;

(ii) The Deputy Secretary; or

(iii) Under Secretaries of the Department of Energy.

(2) For the National Nuclear Security Administration (NNSA) the Administrator, also known as the Under Secretary of Nuclear Security.

Department of Energy (DOE) means, as used in the DEAR, the Department of Energy and includes the National Nuclear Security Administration (NNSA), unless otherwise specified.

Senior Procurement Executive means for the Department of Energy, the Director, Office of Procurement and Assistance Management and for the National Nuclear Security Administration, the Deputy Associate Administrator for Acquisition and Project Management.