In 1926, following his studies, Richmond joined
Queen's University Belfast as a lecturer in Classical Archaeology and Ancient History. In 1930, he returned to Rome as Director of the British School. He was a prolific excavator of Romano-British sites, specialising in small-scale excavations, often just a single trench placed at a crucial point in a Roman fort which thereby established both the date and purpose of the fort. He excavated at
Segontium in Caernarfon, Chester, South Shields, Lancaster, Bath,
Silchester,
Inveresk Roman Fort and
Chedworth Roman villa. However his two major projects were at the
Hod Hill Iron Age hillfort where he elucidated the Roman fort that was inserted into one corner, and then at
Inchtuthil near Perth in Scotland, the legionary fortress occupied during
Agricola's advance into Scotland. He also wrote a highly successful book on Roman Britain for the Penguin series. On 25 April 1944, he was appointed a member of the
Royal Commission on the Ancient and Historical Monuments of Scotland. He was also appointed a member of the
Royal Commission on the Historical Monuments of England on 2 April 1946. He was a Commissioner until his death, making an important contribution to their study and record of Roman monuments. ==Death==