 Purnell, hiwere Devrouax+Purnell Architects and Planners, PC, na 1978.   A họpụtara ya ka ọ bụrụ onye isi oche nke National Organization of Minority Architects na 1980, na Washington Project for the Arts na 1988. 
 Purnell, hiwere Devrouax+Purnell Architects and Planners, PC, na 1978.   A hoputara ya ka o buru onye isi oche nke National Organization of Minority Architects na 1980, na Washington Project for the Arts na 1988. 