Lewis, from Cilpost Farm in Whitland, has already won Wales caps at Under-18 and Under-19 evels and before taking up his University studies, he skippered the famous Millfield School in Somerset.
He will be representing his college, Hughes Hall, in a Cambridge side skippered by New Zealander Stewart Eru. Lewis scored 11 points for the Wales Under-21 A side that drew 21-all with England at Pontypridd two years ago.
