Director, Drug Dependence Clinical Research and Treatment Unit, the Bethlem Royal Hospital and the Maudsley Hospital, London.
Chairman, Advisory Council on the Misuse of Drugs.
Chairman, Institute for the Study of Drug Dependence.
Vice President, International Council on Alcohol and Addictions.
Member of The World Health Organisation Panel of Experts on Drug and Alcohol Dependence.
Dr Connell gave service to numerous Government departments and voluntary organisations in the UK. In 1986 he was awarded a CBE.