Holman trained as an architect under his father, before starting his career in
Melbourne. He returned to New Zealand and opened his own practice in Auckland in 1893, later forming the partnership Holman, Moses and Watkin. From 1900 to 1907 his practice articled and trained
William Henry Gummer, who would later work under
Edwin Lutyens and become one of New Zealand's most influential architects in the 20th century, designing New Zealand's
National War Memorial, National Art Gallery and
Dominion Museum building. In 1912 Holman was elected president of the Auckland branch of the New Zealand Institute of Architects. He retired in 1914 from active practice due to ill health, and remained an invalid until his death in 1949, aged 85. The architectural partnership Holman, Moses and Watkin retained his name, and was later responsible for designing the signature Vulcan Buildings on the corner of Queen Street and Vulcan Lane in central Auckland, completed in 1928. ==Buildings==