; (2) to enable participants in the exchange program to return the expertise gained through their exchanges to their original organizations; and (3) to improve communication between and integration of the organizations that support the policy, implementation, and oversight of defense acquisition through lasting relationships. (c) Participants (1) Number of participants The Under Secretary shall select not less than 10 and no more than 20 participants per year for participation in the exchange program established under subsection (a). (2) Criteria for selection The Under Secretary shall select participants for the exchange program established under subsection (a) from among mid-career employees and based on— (A) the qualifications and desire to participate in the program of the employee