Adrian Goldsworthy was a Junior Research Fellow at Cardiff University for two years and subsequently taught part-time at King's College London and was an assistant professor on the University of Notre Dame's London program for six years. He also did bits and pieces of teaching at other universities. He has lectured on a range of topics, including both Greek and (particularly) Roman History, but also taught a course on the military history of the Second World War at Notre Dame.
While at St John's College, Oxford University he was awarded a D.Phil. in Literae Humaniores (Ancient History) in 1994. The topic of his thesis was 'The Roman Army as a fighting force, 100 BC-AD 200'. A modified version of this was subsequently published in the Oxford Monographs series under the title of The Roman Army at War, 100 BC - AD 200 (1996). This remains in print and is one of the best selling works in the series.