Harold Bryce Mortlock AM, LFRAIA, ARIBA (14 October 1921 – 3 July 2004) was an Australian architect and planner, alongside Sydney Ancher, Stuart Murray and Ken Woolley.

[citation needed] During World War II, Mortlock traveled to Canada to train as a pilot with the Royal Canadian Air Force.

There he studied under architect Leslie Wilkinson and the artist Lloyd Rees, who taught architectural history and freehand drawing.

In 1970 Mortlock, in partnership with others, applied his interest in planning and the need for increasing density to the drafting of a Building Code for North Sydney Council.

As two of the first residents of that area, the Mortlocks confronted the North Sydney Council who had begun clearing the bush land fronting Long Bay.

The Mortlocks managed to convince the Council to stop this destruction, and over the next four decades they cared for the public land near their home – tirelessly cutting the lantana and balloon vine that grew in the wake of the clearing.

[citation needed] The Royal Australian Institute of Architects' (RAIA) National President Warren Kerr on Bryce Mortlock: "Bryce Mortlock was well-known for his energetic support of the architectural profession and the RAIA, and for his willingness to speak out on matters of importance, especially as they affected good design," Mr Kerr said.

[citation needed] Although he enjoyed a national reputation, Mortlock's passion for sensitive environmental relationships in urban design and practice was also recognised by his local community.