Career
Robertson played for Auckland and first represented New Zealand in 1946 against Great Britain. During the 1951 French rugby league tour of Australia and New Zealand, Robertson was selected to play for New Zealand in Auckland. Robertson retired in 1952, having played in eighteen Test matches for New Zealand.
Robertson served as an Auckland selector in 1958 and assisted the touring South African side in 1963.
In 1964 he was made the coach of the New Zealand Kiwis, serving for two seasons and finishing with a record of four wins and one Test loss. In the 1970s Robertson returned to coaching Ellerslie.
Robertson participated in an Auckland-based group, "The Waihi Connection", retaining his links with the area of his birth. Robertson was made one of the New Zealand Rugby League"s Legends of League in 2000.