All persons other than probationary officers subject to civil service examination may be removed from office or employment only upon charges preferred in writing for misconduct or failure to perform their duties; provided, however, that, pending the hearing of such charges, the respective department head may suspend with pay any such officer. All such charges shall be heard by the Civil Service Commission after a copy of the charges has been transmitted to the person against whom filed and due opportunity has been given him to defend. The Civil Service Commission shall, after hearing the evidence, either revoke, affirm or modify the order appealed from, and its action shall be final. (Ord. 20206 §§ 28, 86, 9-10-19.)