[1] In 1956 he was recruited back to Auckland, New Zealand by Sir Douglas Robb, and pioneered the development of cardiopulmonary bypass in that country, the first patient being operated on in 1958.

While this task must have been made more difficult by New Zealand's relative remoteness and small population, the Green Lane Hospital surgical team quickly achieved an international reputation for innovative excellence.

Indeed, he suggested that Auckland's isolation conferred an advantage comparable to that enjoyed by the Mayo Clinic in small-town Rochester, Minnesota, making it less likely that day-to-day interruptions would interfere with the real purpose of their work.

[1] In 1969 he brought the technique of profound hypothermia and circulatory arrest into the limelight as a practical method for dealing with major corrective surgery in neonates with congenital heart disease, in so doing further establishing Green Lane Hospital on the international stage.

The 1987 Asian Pacific Congress was a particular success for him for the size of the international contingent it drew and the bright spotlight it shone on Green Lane's history of achievement.