Seidler was an architect with a well-documented architectural career. In addition to his building works, he also designed selected items of furniture including a "modular radio-phonograph" illustrated in 1957, a wall-mounted storage unit for his Point Piper studio ca.1948 and the Rose Seidler house 1949-1950. His early commissions used the Sydney cabinetmakers Paul Kafka and M. Gerstl Cabinet Works.