any such private sector employee may be awarded an appropriate diploma or degree under section 2161 of this title. (b) Eligible private sector employees (1) For purposes of this section, an eligible private sector employee is an individual employed by a private firm that is engaged in providing to the Department of Defense, the intelligence community, or other Government departments or agencies significant and substantial intelligence or defense-related systems, products, or services or whose work product is relevant to national security policy or strategy. (2) A private sector employee admitted for instruction at the National Intelligence University remains eligible for such instruction only so long as that person remains employed by the same firm, holds appropriate security clearances, and complies with any other applicable security protocols. (c) Annual certification by Secretary of Defense Private sector employees may receive instruction at the National Intelligence University during any academic year only if, before the start of that academic year, the Secretary of Defense determines, and certifies to the Committee on Armed Services of the Senate and the Committee on Armed Services of the House of Representatives, that providing instruction to private sector employees under this section during that year will further the national security interests of the United States. (d) Program requirements The Secretary of Defense shall ensure that— (1) the curriculum in which private sector employees may be enrolled under this section is not readily available through other schools and concentrates on national security relevant issues