Dr Goss is a Fellow and Tutor in Medicine at Wadham College, and a lecturer in the Pathology Department. He established the radiation hybrid technique 'Goss-Harris method' for human gene mapping, and he went on to study the growth and differentiation of hepatomas. He was until recently Director of Pre-Clinical Studies (1997-2005), and was closely involved with the expansion of the Medical School and revising the curriculum. He was the project sponsor for the building of the Medical Sciences Teaching Centre. Following a year as Senior Proctor, he was seconded to become Director of the Oxford Learning Institute. He continues to teach to the BM courses.