The newly appointed US Ambassador to Ghana, Robert Porter Jackson, on Wednesday February 3, presented his letter of credence to President John Dramani Mahama at the Flagstaff House.
Ambassador Jackson has served as the U.S. Department of State’s Principal Deputy Assistant Secretary for African Affairs since October 2013.
He also served as the U.S. Ambassador to the Republic of Cameroon from 2010 to 2013.
He has also served in Washington, D.C., as the Director of the Office for the Promotion of Human Rights and Democracy; as the Country Officer for Zimbabwe, Botswana and Nigeria; and as the Coordinator of the Entry-Level Officer Training Program and Deputy Director of the Orientation Division at the Department of State’s Foreign Service Institute. 
He replaces Ambassador Gene Cretz.
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By citimonline.com/Ghana