Sydney carried on one of the familys traditional occupations and became an architect working from his father`s practice in 1889. He started his own firm in 1899 and had an office at 203 Strand, London. He was admitted to the Royal Institute of British Architects in 1900 and became a fellow in 1907. He specialised in commercial/industrial properties and designed several department stores, including C&A modes throughout the country.
He lived at home until at least 1891 but he was living with his father at 14 Westover Road Wandsworth in 1900. Vincent seems to have left the family home about the same time as his father !