Cllr Cilliers Brink was elected as the Executive Mayor of Tshwane on 28 March 2023. Before his election, he served as a Member of Parliament of the official opposition, the Democratic Alliance (DA). He also served as DA Shadow Minister of Cooperative Governance and Traditional Affairs, as well as one of the DA’s two national spokespersons.

From August 2016 until May 2019, Cllr Brink was a local government councillor and the MMC for Corporate and Shared Services in the City of Tshwane. His Mayoral Committee portfolio included responsibility for legal services, human resources, ICT and fleet management. He holds an LLB from the University of Pretoria and is an admitted (non-practicing) advocate of the High Court of South Africa. He grew up in Phalaborwa in Limpopo.