Professor Singer is a Fellow and former member of the Council of the British Pharmacological Society, Secretary of the European Association for Clinical Pharmacology and Therapeutics, President of the Fellowship of Postgraduate Medicine, and Chair of the Advisory Board for the journal Health Policy and Technology. He is a member of the European Medicines Agency Health Professionals Working Party.
He gained extensive experience of managing blood pressure while working within the Blood Pressure Units at Charing Cross & Westminster Hospital Medical School, London (1985-1989) and at St George's Hospital Medical School, London (1989-2003). From 2006-9 he was a member of the Executive Committee of the British Hypertension Society.
Professor Singer is interested in drug discovery, vascular mechanisms and non-invasive biomarkers important for prevention and treatment of cardiovascular disease, and improving safety and effectiveness in use of medicines. The Pocket Prescriber he co-authors has its 9th edition due in 2015. Its first daughter publication - Pocket Prescriber Emergency Medicine was published in September 2013. Professor Singer is also interested in promoting better public understanding of new treatments, and the benefits and risks of medicines, including in low resource internatiional settings. He has worked within the HRH programme within the UHC health system in Rwanda.
In 2009 with Michael Hulse he co-founded the annual international Hippocrates Prize and annual ionternational Symposia for Poetry and Medicine. In 2013, he co-founded the International Hippocrates Society for Poetry and Medicine and the Hippocrates Press.