The Union agrees that the Executive Director, the Executive Director's confidential secretary, the Director of Operations, Engineers and Trainees represented by Local 399, Nursing Supervisor, Pharmacists, Optometrists, Podiatrists, Director of Medical Management, Nutrition Department Head, Manager of Quality Improvement, and the Director of Health Services are to be excluded from the collective bargaining unit, but may participate in the Union's benefit plans. In the event an employee currently in one of those positions is removed from such position for a reason which would not constitute just cause for discharge, said employee will be eligible to bid for positions within the collective bargaining unit in accordance with Article XVI of this agreement. Said employee will retain her current length of service for all purposes, including job bidding