Mamoso is a board member and treasurer of the South African Wind Energy Association and the Chairperson of its Asset Working Group. She was the financial director for the African region of Parker Hannifin (Africa) Proprietary Limited, the world’s leading diversified manufacturer of motion and control technologies and systems. She joined Dorper Wind Farm (RF) Proprietary Limited in 2013, was the financial director of the company and later chief executive officer, where she was responsible for strategic management, financial management and direct oversight of all operational, technical and support functions of this renewable energy business. She is a non-executive director of Interwaste Proprietary Limited and a trustee of the Molteno and Sterkstroom Community Trust.
Mamoso has extensive experience in both the renewable energy sector and in the corporate governance sphere of South Africa and prioritises the role of renewable energy and economic development in the transformation of rural economies.