Jamie Cox resigned his position as a national cricket selector on Friday, continuing a number of recent changes that has seen the Australian chairman of selectors step down and coach Tim Nielsen asked to reapply for his position.
Cricket Australia said Cox, a former opening batsman for Tasmania state and captain for England county side Somerset, would stay on until a new selection panel is announced. He replaced former Australia captain Allan Border on the panel in November 2006.
On August 19, Andrew Hilditch stepped down as chairman of selectors following the release of a report by former mining company executive Don Argus, who held a seven-month review following Australia's loss of a home Ashes series to England last season.
Hilditch had been a part-time chairman and the position will now become full-time, while the selection panel will be expanded from three members to five and include two independent selectors plus the Australia coach and captain.
The role of head coach, currently held by Nielsen, will be expanded and refined, forcing him to reapply for the job. Argus' report said current selector Greg Chappell should not continue in that role while he remains national talent manager.
The review was commissioned by Cricket Australia following the country's first home Ashes series loss since 1987.
Cox, who will remain as director of the South Australian Cricket Association, said his decision was linked to a "clear mood for change."
"I think it's time for a new panel to be given the opportunity to set its own direction without links to the past," Cox said in a statement released by Cricket Australia.
"While the transition from our era of dominance has been challenging, I leave the role strong in the belief that we have a terrific group of young men emerging, to lead Australia back up the test cricket rankings."
Former No. 1 Australia has dropped to No. 5 in the world test rankings, just behind Sri Lanka, which it is playing in a current series. England recently replaced India as the top-ranked test team, while South Africa is No. 3.