"David became Chief Executive of BESA, the trade association for commercial MEP contractors, in 2018, following a career as a nuclear submariner in the Royal Navy, then a mechanical services contractor. He has 30 years of contracting experience and knows the specialist contractor's role well. David was an early adopter of renewable technologies and now sits on the Build UK Board and the Steering Board for Skills for a Sustainable Skyline. He is a frequent speaker on competence and compliance, energy efficiency, system integration, low carbon initiatives, the future of the sector and the gap between design and performance in buildings. "