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Our management team has a combined, cumulative, and complementary experience spanning the diamond value chain, from exploration, through mine development, operations, marketing, and financing.


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Mark Wall


Mr. Mark L. Wall has been President, CEO and a Director since November 2021.  Prior to joining the company, he was the CEO of Streamers Gold Mining Corporation, a wholly owned subsidiary of Shandong Gold Mining (Hong Kong) one of the world’s largest gold mining companies by market capitalization.  Mr. Wall was previously the Chief Commercial Officer then Chief Operating Officer for TSX listed Nevada Copper and the Senior Vice President & Operations Officer for Barrick Gold Corporation (TSX/NYSE).

Mr. Wall has more than 25 years of experience in the mining industry in executive, commercial, operations and sustainability roles.  During his twelve years at Barrick he also served as General Manager of the 80 m/t pa Veladero open pit mine in Argentina, the Vice President overseeing non-financial assurance activities (Environment, Safety & Health, Maintenance, Technical Services, Community Relations and Security) and other roles.  Prior to joining Barrick Mr. Wall worked with Placer Dome Inc. and Western Mining Corporation.

Mr. Wall holds various degrees and qualifications, including a Diploma in Minerals Processing, Master of Business Administration, Master of Management, Masters Certificate in Risk Management & Business Performance and Diploma of Project Management.  Mr. Wall is a Fellow of the Australasian Institute of Mining and Metallurgy.

Steven J. Thomas

B.Sc., FCA
Chief Financial Officer

Mr. Steven Thomas commenced as the Company’s Chief Financial Officer in February 2022. Prior to joining Mountain Province Diamonds, Mr. Thomas served as Chief Financial Officer of Franchise Global Health (2021 2022), Chief Financial Officer of Torex Gold Resources Inc. (2018 - 2020), Chief Financial Officer of Goldcorp Canada (2016 - 2018), Chief Financial Officer of De Beers Canada Inc. (2006 – 2016), Head of Finance De Beers Diamond Trading Co. (2003- 2006), Chief Financial Officer Aquarion Inc. (2000 – 2003). Mr. Thomas is a graduate of the University of Wales (Joint Hons Accountancy & Economics.), and a Fellow of the Institute of Chartered Accountants (FCA).

Reid Mackie

Vice President Diamond Marketing

Mr. Mackie has been the Company’s Vice President Diamond Marketing since November 2015. Prior to joining the Company, he was with Rio Tinto Diamonds, where he held the positions of Manager Sales and Marketing for Argyle Pink Diamonds in Perth, Australia (2011 to 2015) and Senior Executive Trader in Antwerp, Belgium (1999 to 2010). At Argyle, Mr. Mackie was responsible for the pricing and sales of all Argyle pink polished diamonds including the Argyle pink diamond tender. In Antwerp, Mr. Mackie was responsible for valuation and sales of rough diamonds from the Diavik, Argyle, Murowa, Ellendale and Merlin diamond mines. Mr. Mackie is a graduate of the University of British Columbia (B.A., 1994).

Tom E. McCandless

Ph.D., P.Geo.
Vice President Exploration

Dr. McCandless has over 40 years of experience in mineral exploration and was directly involved in the exploration that led to the discovery of the Ekati and Renard diamond mines. More recently he served as a Director on the board of Kennady Diamonds Corp. where he was part of the team responsible for the due diligence and negotiations leading to the acquisition of Kennady Diamonds by Mountain Province in April 2018. As president of MCC Geoscience Inc. he has consulted for grassroots exploration through to operating mines located in North and South America, Africa and Europe. He is also a registered professional geoscientist (BC, NT/NU) and an Adjunct Professor at the University of Alberta and University of Arizona.

Matt MacPhail

Chief Technical and Sustainability Officer

Mr. MacPhail is the Company’s Chief Technical and Sustainability Officer. Mr. MacPhail has over 10 years of experience in the mining industry, where he has held various roles in operations, projects, and finance. Prior to joining the Company, Mr. MacPhail served as the Technical Lead within the Project Management Office of Dumas Contracting, an Ontario-based mining contractor where he was responsible for project financial and operational performance across Canada and Mexico. Prior to his role with Dumas, Mr. MacPhail was part of the Equity Research team at Canaccord Genuity, a Canadian investment bank where he covered small/intermediate mining companies. Earlier in his career, he was part of the technical team that brought the 3.4 million-ounce Young-Davidson Gold Mine online in Northern Ontario, from exploration to commercial production. Mr. MacPhail holds a Bachelor of Applied Sciences, Mining Engineering from Queen’s University, a Masters of Business Administration (finance) from Ivey Business School, and is a licensed Professional Engineer in the Northwest Territories and Nunavut, as well as Ontario.

Natural diamonds from Canada’s North, creating value and respecting the invaluable.

60.60 Carat Vivid Yellow Rough Diamond