Draftsman, Marsh, Smith and Powell, Architects, Los Angeles, CA, 1944-1945; Draftsman, Paul Hunter, 1945-1948; Associate, Clifford K. Denman, Harry T. MacDonald, Associated Architects, Los Angeles, CA, 1948-1956; Principal, Harry T. MacDonald, Architect, Los Angeles, CA, c. 1957;

When surveyed in 1962, MacDonald indicated that he was a Registered Architect in the State of California; at this time, he made a specialty of secondary school design.

B.Arch., University of Southern California, Los Angeles, CA, 1944;

Elected to Scarab, University of Southern California, Los Angeles, CA, 1943;