The former Bidvest Wits, Orlando Pirates and Cape Umoya United head coach has spent the past few years working as an assistant coach to Carlos Queiroz with national teams Egypt, Iran and Qatar.
He returned to club football as assistant manager at Cape Town City, ahead of his appointment with Spurs.
De Sa was originally unveiled as the club's technical director, but he will now also take up roles within the first team as the club prepare for a second season in the ABC Motsepe league.
"Yes, Roger De Sa is appointed as a technical director; he also coaches, but his job title is that of a technical director," Spurs CEO Alexi Efstathiou told KickOff.
"He will be coaching the first team, and he will also look after the other teams below that.
"In the ABC Motsepe League, we are only starting in September; we are still busy with pre-season now. We've only been training for two weeks now.
"So, Roger De Sa will take the team for now."
