She began working for the United Nations in 1989. In 2019, Keita became the Assistant Secretary-General for Africa. In January 2021, she was appointed to lead the United Nations Organization Stabilization Mission in the Democratic Republic of the Congo
MONUSCO and to be the
UN Secretary General's Special Representative in the
Democratic Republic of the Congo. She succeeded the Algerian UN official
Leila Zerrougui. In April she issued a statement to the press. While accepting that people had the right to criticise MONUSCO she felt that some of the points were unfair. She wrote that "relationship between the United Nations and the Democratic Republic of the Congo is of an intensity and complexity that I have rarely seen elsewhere." In March 2023 she spoke to rally local support for the MONUSCO mission. 600,000 people had been effected by violence and MONUSCO was seen to be ineffective. On 2 to 4 May 2023 there was flooding in the
Kalehe Territory that destroyed 5,000 homes and killed about 400 people. The World Food Programme was aware that there were over 100,000 internally displaced people and 50,000 people were expected to need assistance. Keita visited the area that month seeing the survivors and the damaged area.
Nelly Mbangu and Keita attended when
Micheline Ombae who was the new Minister for Gender opened an exhibition in Kinshasa in September 2025. It was titled "Cross-perspectives: Congolese women in the spotlight" and it was an international exhibition for peace as there was a similar exhibition in New York. ==References==