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Harry Kenyon-Slaney
Non-Executive Chairperson
BSc Geology (Southampton University), International Executive Programme (INSEAD France)
Harry has over 40 years of experience in the mining industry, principally with Rio Tinto. He is a geologist by training and his experience spans operations, marketing, projects, finance and business development. He has worked in South Africa, Australia and the UK. Until 2015, Harry was a member of the Group Executive Committee of Rio Tinto, where he held the roles of CEO of Energy and before that CEO of Diamonds and Minerals. Prior to this he variously led Rio Tinto’s global titanium dioxide business, was CEO of Rio Tinto’s listed subsidiary, Energy Resources of Australia Limited, was general manager of operations at Palabora Mining Company in South Africa and held senior marketing roles in copper, uranium and industrial minerals. He began his career as an underground geologist with Anglo American on the gold mines in South Africa.
Appointed
Harry was appointed as Chairman of the Board in June 2017.
Board Committee Membership
Chairperson of the Nominations Committee and a Member of the Remuneration and Sustainability Committees.
Current external appointments
Harry is currently a senior adviser to McKinsey & Co. Harry is the Senior Independent Director of Sibanye-Stillwater and WE Soda, a member of the advisory board of Phoenix Copper Limited, and a director of several other private companies.
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Mike Brown
Non-Executive Director
B.Sc. Engineering ( Mining) (University of Witwatersrand); PR. Eng (ECSA); Strategic Executive Program (London Business School)
Mike has over 40 years’ experience in the resources industry in operational, senior management and director roles. He spent six years in Switzerland as the Managing Director technical at Pala, where he oversaw all technical aspects of the mining sector investments, including the risks associated with resource performance, project management, ramp-up, operations, and the associated working capital and financial controls. Prior to joining Pala, Mike spent 21 years with De Beers in southern Africa in various roles, culminating in the post of chief operating officer where he was accountable for five operating mines, including greenfield and brownfield growth projects. He also managed the restructuring at De Beers Consolidated Mines in 2005/2006 and again in 2009. Mike has overseen growth projects and building of mines in Namibia, South Africa, Sierra Leone, Vietnam and USA.
Appointed
Mike joined the Board in January 2018.
Current external appointments
None
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Mazvi Maharasoa
Non-Executive Director
LLB, LLM International and Commercial Law (University of Buckingham)
Mazvi has over 24 years’ experience in senior management positions, including leading roles in the mining sector, having served as the resident director and chief executive officer of Letšeng Diamonds Proprietary Limited until 2017. Furthermore, Mazvi was also the founder and president of the Lesotho Chamber of Mines (2016). Prior to her work in the mining industry, Mazvi was involved in the Ministry of Natural Resources and the Central Bank of Lesotho, where she was the senior legal counsel for each of these entities. Since joining the Board, Mazvi has been appointed as the designated nonExecutive Director for workforce engagement.
Since joining the Board, Mazvi has been appointed as the designated non-Executive
Director for workforce engagement.
Appointed
Mazvi joined the Board in July 2019.
Current external appointments
Mazvi is currently the Chairperson of First National Bank Lesotho Limited and a non-Executive Director of several private companies
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Rosalind Kainyah
Non-Executive Director
BA (Hons) (University of Ghana); LLB (Hons) (University of London); LLM (University College, University of London); Member of the Bar of England & Wales (Gray’s Inn)
Rosalind is a trusted adviser to Boards and Senior Executives on sustainability and responsible business. She trained as a lawyer and is a member of the Bar of England and Wales. Rosalind has over 30 years of combined international, senior management, executive and board level experience. She has worked with companies and organisations including Linklaters, Anglo American Corporation of South Africa, De Beers, Tullow Oil plc, the United Nations Environment Programme and ERM, and on projects across Africa, in the UK, Europe, North and South America, Asia, and the South Pacific. As a result, she has a wide network and is respected across a range of stakeholders from governments and corporates through civil society organisations and media for her professional expertise and as a woman of integrity and credibility.
Appointed
Rosalind joined the Board in May 2021.
Current external appointments
Rosalind is currently a non-Executive Director for discoverIE plc, EnQuest plc and of two private companies.
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Janet Blas
Non-Executive Director
Janet is an accomplished professional with extensive experience in the finance, gemstone and mining industries. She holds a Certified Public Accountant qualification, complemented by a BSc in Accountancy. Janet began her career with PwC, building a solid technical foundation in financial management and audit practices. She has established herself as an effective Audit & Risk Committee Chair, demonstrating a deep understanding of governance practices in both listed and privately held mining companies.
Currently, Janet is the Chief Financial Officer and Executive Director of Bacanora Lithium Limited. Her previous tenure as Chief Financial Officer at Gemfields Group has provided her with a comprehensive understanding of the complexities and strategic demands of the precious minerals sector. She also held a number of senior positions with ENRC Plc, including a key role in ENRC’s initial public offering on the Main Market of the London Stock Exchange when the company joined the FTSE 100 index. Previously, Janet was part of the Audit and Assurance Services Team at Ernst & Young LLP in London and PWC in the Philippines.
Janet is recognized for her strong board governance experience, consistently implementing effective financial oversight structures. Her career has predominantly focused on the mining industry, where she has developed in-depth sector expertise across various commodities and established a proven track record leading teams across multiple jurisdictions. Additionally, she has been actively involved in integrating ESG principles into operations, emphasizing ethical mining practices, transparency, and community engagement.
Appointed
Janet was appointed as Non-Executive Director in April 2025.
Board Committee Membership
Chairperson of Audit Committee and a member of the Remuneration Committee.
Current external appointments
Janet holds Non-Executive board roles with Sedibelo Resources and Cornish Lithium, alongside her executive position as Chief Financial Officer and Director of Bacanora Lithium. All these companies are privately held.
