CENTROW Webinar Series: Rethinking Collective Bargaining & Organisational Rights: Trade union and collective bargaining rights for workers who are not employees: organisational and constitutional issues' Founded 17 May 2018, TUMSA – Trade Union for Musicians of South Africa – established its National Head Office in Cape Town, South Africa. TUMSA regards itself as an authentic and representative Trade Union. TUMSA members are employees and self-employed workers who are dependent on music for their primary source of income. Gabi Le Roux is the General Secretary for TUMSA.