Tim Nielsen has decided to resign from his role as coach of Australia.
The 43-year-old took over the position in 2007, winning nine Test series from a possible 15.
The Australians have also become the number one side in one-day internationals under Nielsen's guidance, with a record of 17 victories from 25 ODI series.
"It has been an honour and a privilege to work with the Australian cricket team in the role of Head Coach for the last four and half years," Nielsen told the Cricket Australia website.
"Throughout that period we have had some great success as well as experiencing some tough times. I have enjoyed every minute of working hard with the playing group, aiming to give ourselves the best possible chance of representing Australia to the very best of our ability.
"I look forward to the challenges that lay ahead in my coaching career and have no doubt the experiences I have gained working with the Australian cricket team will hold me in good stead moving forward."
Nielsen has also advised CA board that he will take up a new role within Australian cricket, which will be announced shortly.
