In 1998 she became a member of the OAU sitting on the Women Committee for Peace and Development, In 1999 she was a member of the "Council of the Future", UNESCO, Paris, France, in 2000 she was a Member of the Tanzanian Parliament Ukerewe Constituency. In 2002 she was a member of the OAU's High Level Advisory Panel of Eminent Persons. In 2002 Mongella was a member of the Regional Reproduction Health Task Force for the World Health Organization's African Region, she was also leader of the OAU Election Observer Team to the Zimbabwean Presidential Election. 2003 saw her as Goodwill Ambassador for the World Health Organization's Africa Region. She became a Member and President of the Pan African Parliament in 2004. In 2005 the University of Georgia awarded her the Delta Prize for Global Understanding. She was designated Chairperson of the International Advisory Board of the African Press Organization (APO) in February 2008.