At the 2003 World Championships he and his teammates won the silver medal at the 4x100 metres relay.

At the 2008 Summer Olympics in Beijing he competed at the 100 metres sprint and placed 3rd in his heat, just 0.06 after Usain Bolt and 0.02 after Daniel Bailey in a time of 10.26 seconds.

He qualified for the second round in which he ran slower with 10.31, resulting in a sixth place and elimination for the semi-finals.

[1] Together with José Carlos Moreira, Sandro Viana and Bruno de Barros he also competed at the 4x100 metres relay.

[1] De Silva would retroactively be awarded the bronze medal for the 4 × 100 metres relay at the 2008 Summer Olympics following the demotion of the Jamaican team in 2017 for Nesta Carter's failed anti-doping test.