Frank Duffy, English architect
Francis Cuthbert Duffy (born 3 September 1940) is a British architect, a founder of DEGW, the international architectural and design practice best known for office design and workplace strategy and, more recently for advanced thinking on the programming of educational and arts facilities. Duffy is particularly noted for his work on the future of the office and the flexible use of space.He was president of the RIBA from 1993 to 1995. He was appointed a Commander of the Order of the British Empire in the New Year Honours 1997. In 2004, he received the British Council of Offices (BCO) President's Award for Lifetime Achievement and in 2008 was named by Facilities Magazine as one of 25 Pioneers of Facilities Management in the UK. He is currently on the Board of Trustees of The Architecture Foundation.

In the 1960s, Duffy was responsible for introducing Bürolandschaft (office landscaping) into the English-speaking world. His doctoral research at Princeton was focused on the mapping the relationship between organisational structure and office layouts. In the 1970s, he was one of the pioneers who introduced North American practice in Space Planning and Facility management into Europe. He coined the concept of "Shell, Services, Scenery and Sets"(or Shearing layers), the analysis of buildings and building components in terms of layers of longevity to facilitate the accommodation of technological and organisational change. This concept was later elaborated by Stewart Brand in his book How Buildings Learn: What Happens After They're Built (Brand, 1994). In the 1980s Duffy and his DEGW colleagues initiated the ORBIT (Office Research: Buildings and Information Technology) into the impact on office design of advances in Information Technology. This research had a substantial impact initially on key British office projects such as Broadgate and Stockley Park and then on office design worldwide. More recently Duffy's interests have focused on the challenges that increasing reliance on virtual communications is bringing into urban design – asking the question, "In an increasingly virtual world what arguments can architects and urbanists use to justify spaces and places?"

National Life Stories conducted an oral history interview (C467/103) with Francis Duffy in 2013 for its Architects Lives' collection held by the British Library.Frank Duffy was editor of the Architectural Association Journal (1965–67) and of Facilities (1982–90).

As a consultant specialising in Workplace Strategy for almost 40 years, Duffy has worked internationally for a wide variety of corporate and government clients. DEGW now has offices in the UK, the US, France, Germany, the Netherlands, Spain, Italy, Singapore and Australia.