Mmasetshaba began her legal career as a candidate attorney at MHA in February 2022 and was promoted to Associate in the Litigation department following her admission in August 2023. Her primary area of practice is litigation, with a key focus on administrative law, constitutional law, public law and commercial law. She provides professional support to two directors, Leslie Mkhabela and Ehi Enabor.

Mmasetshaba holds BA (Law) and LLB degrees from the University of Pretoria.