Mmusi Aloysias Maimane is a South African politician, businessman, and leader of Build One South Africa, a political party. Maimane is also the former Leader of South Africa's opposition Democratic Alliance (DA) political party from 10 May 2015 to 23 October 2019, and the former Leader of the Opposition in the National Assembly of South Africa from 29 May 2014 to 24 October 2019. He is the former leader of the DA in the Johannesburg City Council and the DA National Spokesperson. In 2011, he was elected to be the DA's Johannesburg mayoral candidate in the 2011 municipal elections. In that election, Maimane helped to grow the party's voter base, but was not elected mayor. Thereafter he served as Leader of the Official Opposition on the Johannesburg City Council until May 2014. In addition to his political career, he is also a pastor and elder at Liberty Church. He formed the One South Africa Movement in 2020. Mmusi Maimane launched this new political party, Build One South Africa on 24 September 2022.