 He represented Singapore in hockey at various tournaments up to 2005.

de Souza is a representative of the People's Action Party and a part of the team which won the 2011 general elections for the Holland-Bukit Timah GRC with a margin of 60.08% of the votes.He is specifically in charge of Ulu Pandan ward where he has been the Parliamentary representative since 2006.He is currently serving on Government Parliamentary Committees on Manpower (as the Deputy Chairman), and Home Affairs and Law.