The Paralympian was granted parole after serving one year of his five-year sentence for killing his girlfriend Reeva Steenkamp on February 14, 2013.
The community service is part of the terms under which he was released.
In his first public appearance since then, he reported to a police station in Pretoria on Saturday wearing sunglasses and carrying a backpack, the BBC reports.
He is serving the rest of his sentence under house arrest at his uncle’s home in the city.
The 28-year-old amputee was found guilty of culpable homicide, or manslaughter, over the death of his 29-year-old girlfriend.
He told his trial last year that he had shot her through a bathroom door because he had mistaken her for an intruder.
The prosecution is appealing against the verdict, saying Pistorius should have been convicted of murder.