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.
Dominic DuffyPresident, 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 DwyerChief 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.
Toni StreczynskiVice President, Processing and Metallurgy
Mr. Streczynski holds a Masters diploma in Technology – Mineral Engineering and has over 20 years experience in Mineral Processing. He has extensive technical, operational management, and leadership development experience. Mr. Streczynski has worked in Metallurgical Research and Development as well as the Iron and Steel and Platinum industries in South Africa. Prior to joining Mandalay he has most recently worked for a major Copper producer in Australia.
Chris DavisVice 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.
Ryan AusterberryGeneral Manager, Costerfield
Ryan Austerberry (MAusIMM CP) has over 15 years’ experience in the resources industry, predominantly in technical roles and project management. Mr. Austerberry has worked with Mandalay Resources Corporation since 2009, and prior to becoming GM of Costerfield, Mr. Austerberry was GM of Björkdal, and was Corporate Manager of Technical Services. Mr. Austerberry holds a Bachelors of Applied Science Degree from the Royal Melbourne Institute of Technology, a Graduate Diploma in Mining from the University of Ballarat, and an MBA from the Australian Institute of Business.
Gunnar RådbergGeneral 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.
Marcelo HerreraGeneral Manager, Cerro Bayo