Ugandan diplomat Olara Otunnu has joined the contest to become the next secretary-general of the United Nations, the seventh contender to succeed Antonio Guterres when he steps down at the end of this year.

Otunnu, a former UN under-secretary-general who served as a special representative for children and armed conflict, was nominated by Uganda in a letter on Friday to the presidents ‌of the UN General ‌Assembly and Security Council.

At 75, he ​is ‌the ⁠oldest ​of the ⁠current candidates for the role, which Guterres has held for two five-year terms.

Guterres’ successor faces the task of revitalising an organization in crisis and declining stature that is under increasing pressure to reform a bloated, costly bureaucracy and cut duplication across its many agencies.

In his vision statement, Otunnu stressed the need to continue institutional reforms ⁠and said he would give immediate priority to ‌efforts to help end major ‌international conflicts. He also pledged work to establish ​a body to oversee UN ‌work on AI and highlighted the need for climate change ‌action that does not undermine economic development.