He commenced his first practice with Ian McKay in 1962, and in 1967 he founded his own practice, Philip Cox and Associates. The firm has grown to become Cox Architecture, with offices across Australia as well as in Dubai and Abu Dhabi. Involved in much of concept design for each project over fifty years, Cox stepped back from the business in 2015 that is now responsible for projects throughout Australia and also in South-East Asia, China, the Middle East, South Africa and Europe. He has been described as "epitomising the Sydney School of Architecture" in earlier projects. His work has won him multiple awards, the first being in 1963, one year after graduating from the University of Sydney. His most recent award was in 1989.
