At the discretion of the City Council the office of the Director of Public Utilities may be created. Such Director of Public Utilities shall be appointed by the Mayor with confirmation by Council. Until such appointment, the Director of Public Service shall continue to assume his duties. The Director shall be a registered professional engineer and shall be selected on the basis of his professional administrative and executive qualifications in the utilities field; he and all subsequent appointments to this office shall be appointed by the Mayor and shall be governed by the Civil Service provisions of this Charter. (Amended 11-7-61.)