Robert Gill is a popular ultrasound physics lecturer. He is highly regarded for his ability to explain complex concepts to non-physicists in an easy-to-understand way. He teaches in a number of university and professional courses and offers online courses via his own "sonophys" website. He is a member of the Board of Examiners of the Australasian DDU (a qualification for specialist physicians) and an Adjunct Associate Professor at the University of NSW. Rob was a member of the renowned Ultrasonics Institute in Sydney, Australia, where he specialised in Doppler research and pioneered fetal Doppler measurements. He has published over 70 scientific papers and book chapters and 150 conference papers and authored 4 international patents. His textbooks and study guides have been widely successful, with over 5000 copies sold worldwide.