Moses last week penned a long-term deal with The Brazilians, leaving Kaizer Chiefs' reserve team following a two-and-a-half-year spell at Naturena.
The 20-year-old defender helped Amakhosi to the MultiChoice Diski Shield title last season, but could not resist when Sundowns came in to snap him up on a free transfer.
With the reigning Absa Premiership champions offering arguably tougher competition for game-time than his previous team, Moses is adamant on proving himself to coach Pitso Mosimane.
“It’s going to be a challenge, but I’m not one to back down from a challenge,” Moses tells KickOff.com.
“Even at Chiefs, it was just as tough trying to break into the first team and getting regular game-time in the MDC team.
“But, personally, I want to grow as a player and I want to improve. I also want to push myself to be able to play as much as possible.
“Being new into the setup and also as a youngster, you’re going to have to prove yourself, and I’m there to do that. I don’t doubt myself.”
Positionally, while Moses will initially set out in the reserve team, he will ultimately be competing for a first team spot in central defence, where the likes of Ricardo Nascimento, Wayne Arendse, Motjeka Madisha and Bangaly Soumahoro are patrolling.
The left-footed centre-back says he in fact prefers a central midfield role, where he will be met by even stiffer competition. Nonetheless, he is willing to fight and ultimately settle on a role that the technical staff see most suitable for him.
“I play left-centre-back and I can also play as a holding midfielder, and I actually prefer playing in the middle,” he says.
“I’m aware that the competition in the first team midfield is tight, but I’m quite adaptable. Wherever the coach needs me to play, I can play.
“I’ve also played at left-back before so wherever I need to play, I will need to play – I’m comfortable with that. I know there will be tough competition but I’m willing to fight.”