Responsible for assisting the Library Director in the planning, organization, supervision, development and administration of all library services, personnel, operations and programs. Assumes the duties of the Library Director in his/her absence. Is directly responsible for personnel administration and the children's and teen services ensuring operational and budget efficiency. Assists in personnel selection. Directly supervises and schedules training for all personnel. Assists Director in evaluation and assessment of overall departmental functions and in the implementation of new service objectives and programs.