Upon completion of his apprenticeship, he studied in Britain under Professor Roger Smith and then worked for Sir Banister Fletcher recording sketches of historic British buildings.
He was admitted an associate to the Royal Institute of British Architects and upon return to Australia he worked for the architectural firm of Ellerker & Kilburn in Melbourne.
[3] He was a collector of Australian native plants, and also worked to establish bush gardens at the Mount Wellington springs.
[5] His will was appealed to the High Court by his wife Daisy regarding whether or not the £1000 annuity he had left her required her to live in his home of Huonden.
[8] A silver altar cross, designed by Walker, was dedicated to him at St David's Cathedral, Hobart in 1932.