Ohio Revised Code Title I. State Government § 124.27

(A) Appointments to all positions in the classified civil service, that are not filled by promotion, transfer, or reduction, as provided in sections 124.01 to 124.64 of the Revised Code and the rules of the director prescribed under those sections, shall be made only from those persons whose names take rank order on an eligible list, and no employment, except as provided in those sections, shall be otherwise given in the classified civil service.  The appointing authority shall appoint in the following manner:  each time a selection is made, it shall be from one of the names that ranks in the top ten names on the eligible list or the top twenty-five per cent of the eligible list, whichever is greater.  In the event that ten or fewer names are on the eligible list, the appointing authority may select any of the listed candidates.  Each person who qualifies for the veteran's preference under section 124.23 of the Revised Code, who is a resident of this state, and whose name is on the eligible list for a position is entitled to preference in original appointment to any such competitive position in the classified civil service of the state over all other persons who are eligible for those appointments and who are standing on the relevant eligible list with a rating equal to that of the person qualifying for the veteran's preference.

(B) All original and promotional appointments in the classified civil service, including appointments made pursuant to section 124.30 of the Revised Code, but not intermittent appointments, shall be for a probationary period, not less than sixty days nor more than one year, to be fixed by the rules of the director for appointments in the civil service of the state, except as provided in section 124.231 of the Revised Code, and except for original appointments to a police department as a police officer or to a fire department as a firefighter which shall be for a probationary period of one year.  No appointment or promotion is final until the appointee has satisfactorily served the probationary period.  If the service of the probationary employee is unsatisfactory, the employee may be removed or reduced at any time during the probationary period.  If the appointing authority decides to remove a probationary employee in the service of the state, the appointing authority shall communicate the removal to the director.  A probationary employee duly removed or reduced in position for unsatisfactory service does not have the right to appeal the removal or reduction under section 124.34 of the Revised Code.