Cathy Zhai, CPA-CGA, B.Sc.
Director, President, CEO & Interim CFO
Ms. Zhai has been the President and CEO since January 2018, and formerly the Chief Financial Officer at Monument Mining Limited since 2001 (formally Moncoa Corporation). Ms. Zhai has over 20 years of extensive experience at executive and senior positions covering executive management, business strategic planning, corporate finance and corporate secretary mainly in the mining industry and other business sectors including: high tech, manufacturing and biotech industries across North America, China, South-East Asia and Australia. She has played a major role in the company’s corporate development and financing, as well as directly participating in the establishment of the Selinsing Gold Mine from its start up. Ms. Zhai is a designated Chartered Professional Accountant (“CPA”) and holds a B.Sc. degree in Mathematics.
Hubert Lehman, BEng, MBA, MMinEng.
General Manager, Production and Project Management
Mr. Lehman has more than 40 years experience in the mining, metals and smelting sectors, including senior leadership roles in operations, project management, engineering, strategy, improvement, innovation and business development across Australia, South Africa, DRC, Brazil, Norway, Germany and Venezuela. His technical experience covers the areas of mineral processing, metal processing & smelting, resource & reserve, mine planning & development, tailing facilities and due diligence for M&A. Prior to joining Monument Mining, Mr. Lehman was Managing Director at Northparkes Mine. He was also the General Manager for the Metal Product business unit of the Hydro Aluminium smelter. Mr. Lehman holds a Bachelor of Engineering (Metallurgical Engineering) from University of Pretoria, Master of Engineering (Mining) from University of New South Wales, and Master in business leadership from the University of South Africa.
Andrew Charles Northfield, B.Sc. (Hons), ACSM
General Manager, Selinsing Gold Mine
Mr. Northfield is a mineral processing engineer with over 35 years of experience in the mining industry. He has gained extensive experience in gold processing techniques, tungsten and tin processing, tantalum, graphite and gemstones. He started at Selinsing as gold plant processing manager in 2009 and played a major role in the construction and operation of the process plant at Selinsing and each expansion phase. Mr. Northfield was promoted to the general manager of the Selinsing operation in 2011. Mr. Northfield has worked in Indonesia, Malaysia, Vietnam, Thailand, Ghana, Brazil, Czechoslovakia, UK, Zimbabwe, Tanzania and Sierra Leone. He holds a Bachelor of Science Degree in Mineral Processing Technology and Associateship from the Camborne School of Mines, UK.
Zaidi Harun, B.Sc.
Director, Vice President, Business Development
Mr. Harun is an experienced exploration geologist with 24 years of experience in international mining industry field work as well as extensive mine geological exploration experience. He has extensive knowledge of the Malaysian mining industry and has been a key senior person in mineral property research, liaison with government and local communities, and implementing the CSR programs. Mr. Harun has spent the last 18 years working on the Selinsing Project site developing the present reserves and resource. He has been involved from the outset in Monument’s preliminary mine planning and initial development for the Selinsing Gold Mine project. He is also a council member of Malaysian Chambers of Mine.
Matthew Ridgway, BSc (Hons), MSc, MBA, MAIG
Chief Managing Geologist (CMG) and Qualified Person (QP)
Mr. Ridgway has been appointed as the Chief Managing Geologist and Qualified Person for the Company since July 2024 through his independent consulting company Hydra Consulting Pty Ltd with a track record of successful discovery and Mineral Resource inventory upgrade. He has over 25 years of expertise in the mineral resource industry, encompassing both open pit and underground production, spans all stages of exploration from project generation and initial exploration to advancing projects through scoping studies towards production, including but not limited to desktop studies, project evaluation and target generation, deposit re-interpretation and production guidance, fieldwork management and reporting. Mr. Ridgway was a District Geologist for Integra Mining from November 2010 to January 2013; a Senior Exploration Geologist at Aragon Resources from February 2010 to November 2010; and a Senior Exploration Geologist at Rubicon Resources from March 2008 to December 2008. Mr. Ridgway holds a BSc (Hons) in Applied Geology from Curtin University of Technology and a MSc in Mineral Economics/MBA from WASM/Curtin Graduate School of Business. He is a Member of the Australian Institute of Geoscientists (MAIG) and meets the requirements of a JORC Competent Person and a Qualified Person (QP) for the purposes of NI 43-101.