Directors & Management

Craig Williams
Non-Executive Chairman 

B.Sc. (Hons)

Mr Williams is a geologist with over 40  years' experience in mineral exploration and mine development. He was the President and CEO of Equinox Minerals Limited, a dual listed TSX - ASX resources company which he co-founded in 1993 with the late Dr Bruce Nisbet. Mr Williams was instrumental in the financing and development of the major Lumwana Copper mine in Zambia which resulted in Equinox being one of the world’s top 20 copper producers. Following the ramp up of Lumwana, Equinox embarked on an acquisition program that resulted in the takeover of the Citadel Resource Group for $1.2 billion, targeting development of the Jabal Sayid Mine in Saudi Arabia. Equinox was taken over in mid-2011 by Barrick Gold Corporation for $7 billion, ending a challenging and exciting 18-year history at Equinox.

Mr Williams was appointed as Director and Chairman of the Company on 27 February 2013.

Matthew Yates
CEO & Managing Director

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 was appointed a Director of the Company on 27 February 2013.

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 was appointed a Director of the Company 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

Robert Rigo
Non-Executive Director


Mr Rigo is an engineer with over 40 years’ experience. He has previously held a number of executive and senior management positions with publicly listed mining companies. He was Vice President - Project Development at Equinox from 2002 - 2011, where he managed the feasibility study, related technical studies and engineering design and construction contracts for the Lumwana Copper Mine in Zambia, which commenced production in 2008. He also established Lumwana’s copper concentrate off-take and logistics contracts. Following Lumwana, Mr Rigo managed the construction of the Jabal Sayid (underground) Copper Mine in Saudi Arabia initially for Equinox and then Barrick. His particular expertise lies in the management of mining operations, feasibility studies and construction of mining and mineral processing projects.

Mr Rigo joined the board of OreCorp as a Director on 1 April 2016

Tania Cheng
Chief Financial Officer

B.Com, CA

Ms Cheng is a Chartered Accountant with over 20 years of accounting and finance experience primarily within the resources sector. After commencing her career in a large international Chartered Accounting firm, Ms Cheng subsequently worked with the Apollo Group Pty Ltd group of companies and at Myanmar Metals Limited. Ms Cheng's involvement with OreCorp commenced in 2012 and she has held senior finance roles within the Company from September 2016 to February 2018 and since September 2019.

Ms Cheng was appointed CFO in July 2021.

Henk Diederichs
Chief Operating Officer

B.Eng (Mech), MAusIMM

Mr Dierderichs 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 Office in October 2021.

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).

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