William J Marshall & Partners is a firm of consulting engineers and architects, which specialises in providing independent technical advice to both technical and non-technical parties through expert witness and design consultancy services. Since its inception by Bill Marshall in 1978, the firm has earned a reputation for providing high quality advice to a wide range of clients, acting as technical experts on more than 3,000 construction disputes in both the United Kingdom and abroad. We have an absolute commitment to a partner-led service and offer clear, impartial advice based on sound professional judgement, an accurate appreciation of technical issues and a first-hand understanding of the construction industry, enabling clients facing complex construction problems to make informed decisions.