5 U.S. Code § 3326 - Appointments of retired members of the armed forces to positions in the Department of Defense
cannot take a civil service position with any component of the Department of Defense (DoD) until I have been off active duty for at least 180 days.
A military retiree must wait 180 days after his or her retirement before taking a civilian job in any branch of DoD, unless prior approval has been received from the service secretary.
This restriction does not apply to shortage category jobs or during a national emergency(5 U.S.C. 3326). The 180-day restriction was intended to prevent the creation of a civil service position for the departing service member to fill or to show undue favoritism to same. Currently,the President has suspended this restriction.