Early in his career as a lawyer for the city of Atlanta, Martin Clarke was fired by Donald Trump in the first episode of the sixth season of his TV show, “The Apprentice.”

Clarke has fared much better in the subsequent 13 years, negotiating transactions for the city in real estate, telecommunications technology, cable franchises and other areas of business. On Jan. 8, Mayor Keisha Lance Bottoms appointed him to oversee how disadvantaged businesses and those owned by minorities and women obtain work for the city.