Derek has been an accredited Healer of The Healing Trust for over 40 years. As a professional musician he is Professor (Emeritus) Music Theatre Performance, University of Gothenburg, and Honorary Patron of the Faculty of Arts and Creative Technologies, University of Applied Sciences, Vilnius and incorporates the use of voice and sound in his healing practice. He has presented Healing Workshops at The College of Psychic Studies (London), The Sir Arthur Conan Doyle Centre (Edinburgh) , the Harry Edwards Healing Sanctuary (Guildford) as well as in the USA, France, Germany and Scandinavia.