Coaching has always been on the horizon for Greenacre, however, and he believed the time was now right to concentrate on that role.
"I've been talking about (the A-Licence) for three years but postponed it when I arrived in New Zealand and it has been on hold since," Greenacre said. "It is part of football that the majority of players have to think about what they will do for the rest of their life when they stop playing."
Greenacre said, now at an advanced point in his career, he had been spending significant time pondering his future. He had contemplated entering the world of business, among other options, but kept coming back to one certainty.
"The fact is, football has been my life and I would like that to continue. I would love to be able to pass on what I've learnt during the past 17 years, which has been a fantastic ride.
"If I can give something back to young players not only in the way of football skills, but also the life skills I have picked up along the way it would be satisfying.
"Hopefully that will be at the Phoenix and the family can stay in New Zealand."