- Operation Excellence (OPEX) Customer Service Training: IAW IMCOM OPORD 22-051: Service Culture Campaign, OPEX training is required for both new employees and supervisors. New employees are required to take the initial OPEX training within 90 days of entry of duty and annually thereafter. Supervisors must complete both the employee OPEX and OPEX for Leaders. Training Coordinators can schedule with Training Integration Branch’s Training Program Support Specialist.