• About Us

Leadership Team

Our Senior Management team is designed to focus on the strength of proven leaders. Each member has a diverse and complementary deep experience in mining operations, development, and finance.

Executive Team

  • Dominic Duffy

    President, Chief Executive Officer and Director

    Mr. Duffy holds a B.Eng in Mining Engineering from the University of New South Wales (Sydney, Australia). He has over 20 years experience working in a wide variety of operations in both technical and production roles and his work exposure has spanned across Australia, South America and Europe. He has a proven track record of operational turn arounds. Mr Duffy has worked for Mandalay resources since 2010 where he oversaw the operational improvements at Costerfield, Bjorkdal and Cerro Bayo. He has held the position of President and CEO of Mandalay Resources since 2018.

  • Nick Dwyer

    Chief Financial Officer

    Nick Dwyer has over 10 years of management, accounting and corporate finance experience across North America, Australia, Europe and Africa. Mr. Dwyer holds a Bachelor of Commerce degree from the University of Western Australia and is qualified as a Chartered Accountant (Australia). Prior to joining Mandalay, Mr. Dwyer served as Head of Corporate Accounting at African Minerals in London, UK, where he assisted with a $1.5 billion foreign investment transaction. Mr. Dwyer also has banking experience from the RBS Banking Group.

  • Ryan Austerberry

    Chief Operating Officer

    Ryan Austerberry (MAusIMM CP) has over 18 years experience in the resource industry, predominantly in technical roles and project management. Mr. Austerberry has worked with Mandalay since 2009, and prior to becoming General Manager of Costerfield, Mr. Austerberry was General Manager of Björkdal, and was Corporate Manager of Technical Services. Mr. Austerberry holds a Bachelor of Applied Science Degree from the Royal Melbourne Institute of Technology, a Graduate Diploma in Mining from the University of Ballarat, an MBA from the Australian Institute of Business, and is a Graduate of the Australian Institute of Company Directors Course. Mr. Austerberry sits on the board of Equus Mining as the Mandalay appointed director.

  • Chris Davis

    Vice President, Operational Geology & Exploration

    Chris Davis holds a BSc (Degree with honours in Earth Sciences) from the University of Melbourne and is a Charted Professional of the Australian Institute of Mining and Metallurgy (MAusIMM CP(Geo)). Having spent 15 years working with narrow vein gold and polymetallic deposits in Australia and Europe, he is a Qualified Person as defined by NI 43 101 and JORC. Chris has managed departments across Mining, Resource Development and Exploration.

Senior Team

  • Adam Self

    General Manager, Costerfield

    Adam Self has over 25 years experience in the resources industry, predominantly in underground production roles. Mr. Self commenced his career as an underground operator across operations in Western Australia and Queensland before locating to BHP Billiton’s Cannington mine, quickly advancing to a supervisor role and continuing to progress though roles in Business Improvement (Six Sigma Green Belt) and Technical Services to become a senior engineer. Mr. Self was a leader of Emergency Response Team, attaining a Certificate 4 in Public Safety (Leadership), and Certificate 3 Mine Emergency Response and Rescue. Mr. Self has been with Mandalay’s Costerfield operation since 2018, originally as Technical Services Superintendent, and since 2019 in the role of Mine Manager.

  • Gunnar Rådberg

    General Manager, Björkdal

    Gunnar Rådberg holds a M.Sc.Eng and a Lic.Eng in Mining Engineering from Luleå University of Technology. He has over 25 years’ experience of mining and has worked for all major mining companies in Sweden such as, Boliden, LKAB and Lundin Mining. He has been in operational management positions as well as manager of Environment, Health & Safety, for the past 20 years.

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