United Nations ? Secretary-General Ban Ki-moon made good on his pledge to appoint a woman from the developing world as deputy Friday, choosing Tanzanian Foreign Minister Asha-Rose Migiro.

In his announcement, Ban called Migiro “a highly respected leader who has championed the cause of developing countries,” and said he planned to delegate much of the U.N.’s management and administrative work to her. She also will oversee socio-economic affairs and development issues.

The deputy secretary-general is a relatively new U.N. post, created by Kofi Annan, Ban’s predecessor, in 1998. After the oil-for-food scandal revealed systemic mismanagement at the organization in 2005, Annan tried to transform the post to help rein in the sprawling bureaucracy. Ban has pledged to streamline the U.N. staff, and Migiro will oversee the day-to-day running of the world body and the changes in management and operations that Ban says he plans.

Migiro, 50, became Tanzania’s first female foreign minister in January 2006 after serving as a university lecturer and Cabinet minister.