Dr Cummins trained at the Royal Marsden Hospital before taking up a substantive post at St Lukes Cancer Centre, Royal Surrey County Hospital, Guildford where he is currently Clinical Director of the cancer centre. He is core member of the team and research lead within colorectal, hepatopancreaticobiliary and oesophagogastric multidisciplinary teams.
He has set up and now chairs the neuroendocrine multidisciplinary service. Dr Cummins is an active researcher and is the principle investigator on twelve trials, producing consequent publications. Involved in the mangement of pancreatic and stomach cancers, Dr Cummins has presented at numerous meetings on related matters.