Dupain also worked extensively for the University of New South Wales and CSR Limited and made many trips to the interior and coast of northern Australia. However, apart from his war service he rarely left Australia, the first time not until 1978, when he was 67, and even then it was to photograph the new Australian Embassy in Paris, designed by his longtime friend and associate Harry Seidler. He wrote, "I find that my whole life, if it is going to be of any consequence in photography, has to be devoted to that place where I have been born, reared and worked, thought, philosophised and made pictures to the best of my ability. And that's all I need".