New South Wales Government Architect in the context of "Chief Secretary's Building"

George McRae (10 September 1857 – 16 June 1923) was a Scottish-Australian architect who migrated from his native Edinburgh to Sydney, where he became Government Architect of New South Wales and designed some of Sydney's best-known buildings, including completion of the Sydney Town Hall, the Queen Victoria Building, and the lower entrance to Taronga Zoo.

Peter Brian Hall (16 May 1931 – 19 May 1995) was an Australian architect active in Sydney and elsewhere from the 1950s to the early 1990s. Schooled in the tenets of modernism his practice was also informed by a strong sense of the importance of function and context in design. During his early years Hall was the recipient of numerous education scholarships and bursaries, most notably a traineeship and then employment with the office of the New South Wales Government Architect, a source of highly creative architecture during the 1960s. However, Hall is best known for completing the Sydney Opera House after the resignation of its original architect, Jørn Utzon, in February 1966. At the age of 34, he was invited by the Government Architect to act as design architect in the newly formed consortium Hall Todd & Littlemore to resolve the issues which had led to Utzon's resignation, principally the design of all the interiors and the enclosing glass walls of the unfinished building. The Opera House opened in October 1973 and despite its subsequent success as Sydney's most popular performance venue, understanding of the work of Hall and his team has been coloured by the controversial circumstances of their appointment. For Hall, both personally and professionally, Utzon's legacy was a poisoned chalice – an unprecedented challenge to complete the building to a standard commensurate with its sublime exterior, but one that brought little recognition during his lifetime.