Which of the organs of the United Nations Organization (UNO) is responsible for appointing staff of the organization?

The organ of the United Nations Organization (UNO) responsible for appointing staff of the organization is the Secretariat. The Secretariat is the administrative arm of the UN and is responsible for carrying out the day-to-day work of the organization. It is headed by the Secretary-General who is appointed by the General Assembly on the recommendation of the Security Council. The Secretariat is responsible for appointing staff of the organization, including the Secretary-General's senior advisers and departmental heads, as well as administrative and technical staff. It is also responsible for implementing the decisions and policies of the other organs of the UN, such as the General Assembly and the Security Council.