Incoming UN Secretary-General Antonio Guterres has announced the appointment of Nigeria's Environment Minister Amina Mohammed to be the UN's deputy secretary-general. <br/><br/>Senior Brazilian foreign ministry official, Maria Luiza Ribeiro Viotti, will serve as Guterres' chief of staff while Kyung-wha Kang of South Korea was appointed to the new position of special advisor on policy.<br/><br/>Guterres has made gender parity a priority of his tenure which begins from first of January.<br/>