She was appointed to the Board of Trustees in June 2023 as a sponsor nominated trustee. She is the Chairperson of the Investment & Strategy Committee and a member of the Audit & Risk Management Committee. She is a Finance Expert with extensive experience in Audit, Financial Management and Corporate Finance. She holds Master of Business Administration (MBA) and Bachelor of Commerce (BCom) Degrees from the University of Nairobi. She is a Certified Public Accountant and a member of the Institute of Certified Public Accountants of Kenya (ICPAK). She also holds a Certificate in Advanced Management Programme (AMP) from Strathmore University, a Certificate in Negotiation Skills from International Law Institute (ILI), a Certificate in Private Participation in Infrastructure Development & Project Finance from Georgetown University and a Certificate in Utility Regulation and Strategy from University of Florida. Prior to joining KenGen, Mary held senior positions at Ernst & Young and Kenya Airways, where she held several managerial positions as Manager Credit Control, Manager Outstations Finance, and Manager Treasury. Mary has risen through the ranks at KenGen, having held several leadership roles as Corporate Finance Manager, General Manager of Corporate & Regulatory Services and Acting General Manager ICT and finally General Manager Finance.