Over several decades Robert contributed to the development of medical diagnostic ultrasound technology as a research scientist. He published more than 70 scientific publications, 150 conference papers and authored 4 patents. He also worked with clinical researchers to develop new applications of ultrasound, most notably in fetal Doppler.

He always enjoyed teaching and this is now his primary occupation. He has written and published a popular textbook ("The Physics and Technology of Diagnostic Ultrasound: A Practitioner's Guide", High Frequency Publishing, Sydney, Australia, 2012) which has been widely adopted by universities, colleges and professional organisations. He has recently released a companion Study Guide. He has also developed several online courses.

He teaches in a number of graduate and professional ultrasound courses and is an Adjunct Associate Professor at the University of New South Wales.