All such appointments shall be without definite term, unless for limited term appointments for temporary services not to exceed one year in duration, except as otherwise specifically provided for herein. Any county officer or employee appointed pursuant to § 15.2-807 may be suspended or removed from office or employment either by the board or the officer who appointed or employed him. In case of the absence or disability of any such officer, the board or other appointing power may designate some responsible person to perform the duties of the office.