Bathusi Aubaas began his professional career with TS Galaxy, where he rose to prominence during the 2018–19 season. Although the club was competing in South Africa’s second division at the time, Aubaas played a role in TS Galaxy’s historic Nedbank Cup victory, which brought him national recognition. His performances in midfield highlighted his work rate, discipline, and tactical awareness.

Following his success at TS Galaxy, Aubaas earned a move to Mamelodi Sundowns, one of South Africa’s most successful clubs. At Sundowns, he has continued to develop as a midfielder, competing at the highest level of domestic football in the Premier Soccer League and contributing to the team’s depth and competitiveness.