Jenkins' former clubs include Pontyberem RFC and Carmarthen Quins.
In February 2007, Jenkins was included in the Wales U20 squad ahead of the U21 Six Nations championship.
He scored a try in the Plate final in Hong Kong against Argentina; the Welsh lifted the trophy courtesy of the 26–19 scoreline.
On 14 May 2008 it was announced that Jenkins would be leaving the Scarlets to join London Welsh.
On 1 July 2009 it was announced that Jenkins was returning to Wales to play for semi-professional side Neath RFC.