The UN Young Professionals Programme (YPP) is a recruitment initiative for talented, highly qualified professionals to start a career as an international civil servant with the UN Secretariat. It consists of an entrance examination process and professional development once those successful start their career with the UN.
Must be a citizen of participating countries (Nigeria inclusive) and must be 32yeara of age or below
All over the globe
Find more info and apply here at https://careers.un.org/lbw/home.aspx?viewtype=NCE&lang=en-US