The administrative officers of the city shall be the city manager, clerk, treasurer, assessor, city attorney, chief of police, planning and zoning administrator and a board of review. The council may, by ordinance or by resolution, establish such additional administrative officers or departments, or combine any administrative officers or departments, in any manner not inconsistent with law or this charter, and prescribe the duties and compensation thereof as it may deem necessary for the proper operation of the city government.