Simpson was born in Woodville, South Australia, the only child of Edward Robert Simpson (c. 1833 – 11 July 1900) of the South Australian Company and Jane Mossman "Jeanie" Simpson née Davie (c. 1837 – 15 April 1910) who married on 28 February 1865. Jeanie married again, to William Gilbert MP on 14 April 1904.[1]
Simpson was educated at Prince Alfred College and the University of Adelaide before being articled to D. Garlick & Son architects.
He was elected a Fellow of the Institute of Architects and on 17 March 1890 joined the S.A. Works and Buildings Department as a draftsman, and was promoted to Deputy Superintendent of Public Buildings in November 1917 and Superintendent in 1920.[2]
^"Family Notices". The Express and Telegraph. Vol. XLI, no. 12, 218. South Australia. 22 June 1904. p. 1. Retrieved 24 September 2018 – via National Library of Australia.
^"Concerning People". The Register (Adelaide). Vol. LXXXV, no. 22, 826. South Australia. 6 January 1920. p. 4. Retrieved 24 September 2018 – via National Library of Australia.
^"Teachers' College". The Register (Adelaide). Vol. XCII, no. 26, 706. South Australia. 22 March 1927. p. 10. Retrieved 24 September 2018 – via National Library of Australia.