Neb. Rev. Stat. §§ 16-308
Each city of the first class shall have such departments and appointed officers as shall be established by ordinance passed by the city council, which shall include a city clerk, treasurer, engineer, and attorney, and such officers as may otherwise be required by law. Except as provided in the City Manager Plan of Government Act, the mayor may, with the approval of the city council, appoint the necessary officers, as well as an administrator, who shall perform such duties as prescribed by ordinance. Except as provided in the City Manager Plan of Government Act, the appointed officers may be removed at any time by the mayor with approval of a majority of the city council. The office of administrator may not be held by the mayor. The appointed administrator may concurrently hold any other appointive office provided for in this section and section 16-325.
Neb. Rev. Stat. §§ 16-308