The 19-year-old South Africa under 20 international transitioned to the senior set-up after staring for the Brazilians' youth and DStv Diski Challenge teams.
He has already been training with the first team and has now signed his first professional contract.
"Congratulations to our client, Thato Sibiya, who has signed his first professional contract with Mamelodi Sundowns FC & been officially promoted to the First Team.
"Having come through the Sundowns Academy & proven himself as a standout performer in the DStv Diski Challenge (DDC), Thato’s journey reflects hard work, humility & perseverance. A massive milestone in a promising career – we’re proud to stand alongside you every step of the way," posted the player's agency Jozi Talent.
Sibiya will have a chance to make his senior debut when Sundowns face Orlando Pirates in the Betway Premiership this weekend.
As the season reaches its conclusion - and with the title still very much up for grabs in a two-way tussle between Mamelodi Sundowns and Orlando Pirates - we look at the numbers and figures that could see either crowned champions.
Kobamelo Kodisang will return to Mamelodi Sundowns following the completion of his loan spell with Stellenbosch.
Mamelodi Sundowns coach Miguel Cardoso is backing his team to make up from the disappointment of their recent league loss with a win in the first leg of their CAF Champions League final.
Mamelodi Sundowns chairman Thlopie Motsepe says the club must be proud of their achievements this season as they face the prospect of conceding the Betway Premiership to title rivals Orlando Pirates.
