Walker first made state selection for New South Wales in the 1992 youth eight which contested and won the Noel Wilkinson Trophy at the Australian Rowing Championships.

[1] In 1994 he was selected in the New South Wales senior eight contesting the King's Cup at the Interstate Regatta.

At the 1995 World Rowing Championships in Tampere they took silver finishing second behind the formidable British crew of Redgrave and Pinsent.

[5] In the 1996 Olympic year, Walker moved into the seven seat of the Australian men's eight.

At Atlanta 1996 with Walker and Wearne in the stern end, the Australian eight made a sixth place finish.