Quentin comes from a publishing family and has contributed both artwork and the written word to several books. He has been chair of the Aqua Group since 1989 and has been closely involved with several recent editions of three of the Group's books (Pre-Contract Practice, Contract Administration, and Tenders and Contracts for Building, all published by Blackwell Publishing).
He is the RIBA Conservation Advisor and has commented on numerous consultation documents and has taken part in several radio interviews. He set up the RIBA London Region Conservation Group, and he has helped to establish the national Register of Architects Accredited in Building Conservation. Quentin teaches on the Architectural Association Professional Practice Part 3 course, on the subject of building contracts. For several years he led building conservation teaching at South Bank University, as well as lecturing in architectural history, design and drawing practice. He has also lectured at several other universities and colleges, mainly in London. He has always believed strongly in the need for greater co-operation within the construction industry, and he was chair of the Junior Liaison Organisation in 1984. He is a member of ICOMOS and a freeman of the Worshipful Company of Chartered Architects.