The civil service of each of the cities of the second class shall be divided into the unclassified service and the classified service. The unclassified service shall comprise:--
All officers elected by the people.
All heads of departments, whose appointment is subject to confirmation by the select council thereof.
The members of each civil service commission.
All persons appointed by name in any statute.
The classified service shall comprise all persons not included in the unclassified service.
53 P.S. § 23439