Born in 1955 in Bath, David was educated from 1962 to 1972 at King Edwards School, Bath. He graduated from Salford University and completed his professional qualification as an Environmental Health Officer at Tameside Metropolitan Council. In 1979 he joined Hebron and Medlock, a sub-contract engineering design company started by his father in 1951. He is now Managing Director of the Group, which employs 1,000 staff, turns over £70m and consists of a technical recruitment arm and a design consultancy.
Since leaving school, David has been involved in the voluntary sector ranging from work with Shelter and adult literacy in Manchester to the Centre for Voluntary Services and the Gateway Club in Bath. He is now Managing Trustee of the Medlock Charitable Trust set up in 1985 by his father, which has contributed £25m to various causes throughout the country, including a Chair in Mathematics, a Chair in Engineering and Design and the Chair of Dean in the Faculty of Engineering and Design at the University of Bath.
David has been Deputy Lieutenant of Somerset since December 2008 and Vice Lord Lieutenant since January 2012. He was previously High Sheriff of Somerset during 2007-2008. He has been married to Jacky since 1981 and is father to three children. His outside interests include rugby and masonry.