Tiago, a student at UCB, joins on a 2 year deal having caught the eye at the back end of last season for the blues team.
The former Portugal u20s representative was called up to the senior squad in March of this year but missed out on selection for their European Trophy campaign through injury.
Hamza; known to many as Diaba, is the Ghanaian national team captain and has represented both their 7s and 15s programmes. Having moved to England in 2016, he has been plying his trade at Birmingham and Solihull and will make the switch to Avery Fields joining on a 2 year contract.
“Both Tiago and Diaba are welcome additions to the squad. Both have an outstanding attitude in their approach to their rugby and are chomping at the bit to push for a first team spot” Head coach Mitch McGahan