Directors & Management

Matthew Yates
Executive Chairman

B.Sc. (Hons), MAIG

Mr Yates is a geologist with over 30 years’ industry experience, covering most facets of exploration from generative work to project development. Prior to founding OreCorp Limited, he was the Managing Director of OmegaCorp Limited and then Joint Managing Director of Mantra Resources Limited and was instrumental in the acquisition of a number of uranium projects, including Mkuju River (Tanzania), Kariba (Zambia) and Mavuzi (Mozambique). He has worked in Australia and southern, east and west Africa, Central Asia and the Gulf Region. He managed exploration teams in Western Australia and Tanzania respectively. Mr Yates has an applied technical background and has held senior positions for over 25 years, including resident Exploration Manager in Tanzania for Tanganyika Gold Limited.

Mr Yates joined the Board of OreCorp as a Director on 27 February 2013. He was in the role of CEO & Managing Director until 16 November 2022 when he moved into the role of Executive Chairman.

Henk Diederichs
CEO & Managing Director
B.Eng (Mech), MAusIMM

Mr Diederichs is an engineer with over 20 years of experience in the mining industry with extensive expertise in project development and operations. He was recently the Senior Vice President Operations for West African producer Allied Gold Corp, which operates the Bonikro, Agabou and Sadiola gold mines. Mr Diederichs formed an integral part in the successful development and operation of Equinox Minerals' Lumwana Copper Mine in Zambia. During this time Lumwana was developed into one of Africa's largest open cut copper mines at a capital cost exceeding US$800m. He initially joined OreCorp Limited as Vice President Project Development in late 2016 and was instrumental in leading the Nyanzaga Gold Project in north-western Tanzania through the Scoping and Pre-Feasibility Study phases.

Mr Diederichs was appointed Chief Operating Officer in October 2021 and then moved into the role of CEO & Managing Director on 16 November 2022.

Alastair Morrison
Non-Executive Director

M.Sc (Hons), Grad Dip App Fin & Inv, MAIG, GAICD

Mr Morrison is a geologist with more than 30 years' experience in mineral exploration and investment. He initially worked for more than six years in Australia as an exploration geologist in Western Australia, then for North Flinders Mines in the Northern Territory during the development of the +5 million ounce Callie gold deposit. From 1996 to 2003 he worked in Tanzania for East African Gold Mines Limited at the North Mara Gold Project. He was responsible for the management of exploration, overseeing the delineation of more than 5 million ounces of resources, including the discovery of the high-grade Gokona gold deposit. In later years, he had additional responsibilities for all in-country development activities, through feasibility and permitting until the commencement of construction. East African Gold Mines was acquired by Placer Dome Inc. in mid-2003 for US$252 million. Since 2004, he has worked as a portfolio manager for a family office investment fund.

Mr Morrison joined the Board of OreCorp as a Director on 27 February 2013.

Michael Klessens 
Non-Executive Director


Mr Klessens is a CPA with over 30 years’ practical financial and management experience, particularly within the resources industry. This experience has involved all areas of corporate and treasury management, project financing, capital raisings, mergers and acquisitions, dual listings, feasibility studies and establishment of systems and procedures for new mining operations. From 2002 - 2011, Mr Klessens was Vice President - Finance and Chief Financial Officer of Equinox Minerals Limited where he was responsible for finance, debt and equity financings, treasury and all financial functions of the company and its operations. Prior to Equinox, Mr Klessens held senior positions in mid-tier Australian resource companies primarily focused on gold.

Mr Klessens joined the Board of OreCorp as a Director on 27 February 2013.

Michael Davis
Non-Executive Director
B.Eng (Chemicals and Materials), FAusIMM

Mr Davis is an engineer with 33 years’ experience in the design and operation of mineral processing projects. He has had extensive experience with the full project life cycle from discovery, definition, design, commissioning and operation through to closure. Mr Davis has global mining experience on studies, projects and operations in Australia, Africa, Asia, and the Americas as both an in-house consultant and senior management with several engineering consulting companies. He has been involved in the development or operation of more than 35 gold and copper/gold projects in Africa including 6 projects in Tanzania and is currently a Director and Principal Consultant at MineScope Services Pty Ltd. 

Mr Davis joined the Board of OreCorp as a Director on 12 October 2022.

Jessica O'Hara
Company Secretary


Ms O’Hara is a corporate lawyer with extensive experience advising clients on general corporate law and regulatory/compliance issues. She has previously held senior positions at both Clayton Utz and Allen & Overy and more recently, had experience acting as in-house legal counsel. Ms O’Hara has advised a significant number of ASX-listed clients with operations in Australia and overseas, with specific experience within the mining and resources sectors.

Ms O’Hara joined OreCorp as legal counsel in August 2021 and was appointed joint company secretary on 6 December 2021 (and subsequently became sole company secretary as from 31 January 2022).

Greg Hoskins
Chief Financial Officer

BCom, CA

Mr Hoskins is a chartered accountant with more than 20 years’ experience across a range of sectors including resources, education and financial services. After commencing his career with international accounting firm Ernst & Young, Mr Hoskins has gained extensive financial and corporate experience in both Australia and internationally, within the areas of corporate and treasury management, acquisitions, mine development and establishment of systems and procedures for new mining operations. More recently Mr Hoskins was the Group Finance Manager at Base Resources Limited and was integral in establishing the finance function at the Kwale operation in Kenya, which has since achieved consistently strong results.

Mr Hoskins joined OreCorp as Chief Financial Officer on 27 February 2023.

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