At Wasps he enjoyed a great deal of success, which included a total of four club trophies that the team won during the 2002–03 and 2003–04 seasons.
After retiring from the Wasps, due to a long-standing toe injury, he joined the England Sevens management team as Assistant Coach under Mike Friday until 2007.
[citation needed] Following the departure of Danny Wilson to the Newport Gwent Dragons, Greening took over as head coach.
On 15 August 2012, Scottish Rugby appointed Greening as the new head coach and programme manager for Scotland 7s.
But Scottish Rugby confirmed on 1 March 2013 that Scotland 7s head coach and programme manager Phil Greening had left.