All cases in which complaints are actually issued by the board, shall be prosecuted before the board or its examiner, or both, by the representatives of the employe organization or party filing the charge, and, in addition thereto or in lieu thereof if the Department of Justice sees fit, by a deputy attorney general especially assigned to this type of case. No examiner shall have any other position with the government of this State or of the United States or with the Pennsylvania Labor Relations Board while in the employ of the board.