First major black operator of Dunkin Donuts franchises
In 1992, Turnbull opened his first Dunkin Donuts franchise in Mattapan. By 1998, he had another four, and today, the number stands at 15.
But Turnbull is more than a coffee shop operator: He is widely considered to be one of the most influential black businessmen in the city. Turnbull operates the franchises as founder and chief executive of The Waldwin Group, based in Dudley Square.