four years. (2) An assignment under this section may be for a period in excess of two years, but not more than four years, if the Secretary determines that such assignment is necessary to meet critical mission or program requirements. (3) A member of the acquisition workforce may not be assigned under this section for more than a total of four years inclusive of all such assignments. (e) Status of individuals assigned to private-Sector organizations (1) A member of the acquisition workforce who is assigned to a private-sector organization under this section shall be considered, during the period of assignment, to be on detail to a regular duty or work assignment, as applicable, in the Department for all purposes. (2) In the case of a civilian member of the acquisition workforce, the written agreement established under subsection (b)(1)— (A) shall address the specific terms and conditions related to the civilian member’s continued status as a Federal employee