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Company Information

Board and Management

Heron has a committed and highly experienced Board of Directors and Management team.


Stephen Dennis

Stephen Bruce Dennis

BCom, LLB, GDipAppFin(Finsia), CFTP
Appointed 6 December 2006
Position: Chairman (Non-Executive)

Stephen Dennis has been actively involved in the mining industry for over 30 years. He has held senior management positions at MIM Holdings Limited, Minara Resources Limited, and Brambles Australia Limited. Until recently, Mr Dennis was the chief executive officer and managing director of CBH Resources Limited, the Australian subsidiary of Toho Zinc Co., Ltd of Japan.

Borden Putnam III

Appointed 12 December 2014
Position: Director (Non-Executive)

Borden Putnam is a geologist with over 38 years of experience in the mineral industry, with focus on exploration and asset evaluations. From 1976-1991 he worked as a project geologist and a district manager for AMAX Exploration and Newmont Exploration Limited respectively. He served as Vice-President and chief geologist for MRDI (now AMEC) from 1991-1996. Mr Putnam was vice-president and principal with Robertson Stephens Investment Management from 1996-2001, and from 2001-2009 was managing director of Eastbourne Capital Management. In 2009, Mr Putnam, established his mining industry consultancy business providing technical evaluations, due diligence audits and investment advice.

Fiona Robertson

Appointed 9 April 2015
Position: Director (Non-Executive)

Fiona Robertson is a finance professional and practicing non-executive director and audit/risk committee chair with a background of 20 years as a chief financial officer in the emerging and mid-tier resources sector and 14 years with Chase Manhattan Bank in London, New York and Sydney in corporate banking, credit risk management and mining finance roles. In 2017, she was named Gender Diversity Champion in Australian Resources by WIRNA, and in NSW Mining in the NSW Minerals’ Council’s Women in Mining Awards for her work with the AusIMM’s WIMnet in promoting the attraction and retention of women in the mining industry.

Mark Sawyer

Appointed 19 August 2015
Position: Director (Non-Executive)

Mark Sawyer co-founded Greenstone Resources in 2013 after a 16 year career in the mining sector. Prior to establishing Greenstone, Mr Sawyer was GM and Co-Head Group Business Development at Xstrata plc where he was responsible for originating, evaluating and negotiating new business development opportunities for Xstrata. Prior to Xstrata Mr Sawyer held senior roles at Cutfield Freeman & Co (a boutique corporate advisory firm in the mining industry) and at Rio Tinto plc. Mr Sawyer is a resident of the United Kingdom.

Ricardo De Armas

BS, MBA (Harvard)
Appointed 22 September 2017
Position: Director (Non-Executive)

Ricardo De Armas is an investment professional at Castlelake, where he focuses on emerging market investments. Mr De Armas has more than 10 years of experience in investment and corporate finance, including roles as vice president at De Jong Capital, principal at Zaff Capital, associate at Citigroup’s investment banking division, and financial analyst at Procter & Gamble. His expertise includes value investments, restructuring and financial advisory. Mr De Armas received his MBA from Harvard Business School and a BS from Universidad Metropolitana in Business Administration.

Peter Rozenauers

BME (Hons I), MAppFin, MAusIMM
Appointed 22 September 2017
Position: Director (Non-Executive)

Peter Rozenauers is a Portfolio Manager with Orion Mine Finance and has over 25 years of experience in the natural resources and finance industry. He earned a BEng (Honors I) in Mining from the University of NSW, a Master in Applied Finance from the University of Technology Sydney and is a member of the Australasian Institute of Mining and Metallurgy. Prior to Orion, Mr Rozenauers was a Senior Investment Manager for a predecessor business of Orion, and prior to that was Managing Director and Head of Asian Commodities Distribution for Barclays Capital in Singapore, a leading global investment bank. Mr Rozenauers spent over 13 years working in senior banking roles in Singapore, New York and London. Mr Rozenauers is a Non-Executive Director of MacPhersons Resources Ltd (ASX) and Chairman of Lynx Resources, a private company.

Ian Pattison

BSc (Hons), PhD, MAusIMM
Appointed 29 November 2017
Position: Director (Non-Executive)

Dr Pattison is a highly respected metallurgist with over 30 years of Australian and international experience. His early career was with CRA where he held senior roles in operations, engineering and then as Metallurgy Manager in their base metal division. He joined Denehurst following their purchase of the Woodlawn Mine from CRA to take on an Executive Director role with the Woodlawn and Benambra mines. This was followed by Director and Managing Director roles in the nutrition industries mainly with the German based Henkel/Cognis companies. For the past 10 years he has been the Group Manager Metallurgy for the Australian operations of Japan’s Toho Zinc which incorporates the construction of the Rasp Mine in Broken Hill and operations at the Endeavor Mine at Cobar.


Simon Smith

B.Bus, CA
Appointed 11 August 2014
Position: General Manager, Finance & Administration and Company Secretary

Simon Smith has been a chief financial officer of both private and public companies in Australia and the USA. He brings 20 years experience as a Chartered Accountant and holds a Bachelor’s Degree in Business from the University of Technology Sydney. Mr Smith was the CFO and company secretary for TriAusMin prior to the merger with Heron.

David von Perger

BSc (First Class Honours), MAusIMM
Appointed February 2004
Position: General Manager, Exploration & Geology

David von Perger is a geologist with some 20 years experience in mineral exploration. His experience includes four years as a business analyst for a major mining group involving analysis of mining operations, project development and assessment of new opportunities for an international mining group. Since joining Heron, Mr von Perger has been responsible for the identification and acquisition of several new nickel, gold, iron-ore and base-metal projects.

Brian Hearne

BAppSc (Metallurgy)
Appointed 4 October 2016
Position: General Manager, Woodlawn Mine

Brian Hearne is the General Manager of Woodlawn Mine. Mr Hearne is a qualified mining professional and holds a degree in metallurgy (BAppSc). Mr Hearne has extensive base-metals previously having had a 16-year tenure at Woodlawn, starting in 1978, with a further 2 years at the Benambra Mine in Victoria. He then joined MIM at McArthur River (MRM) as the Metallurgical Manager, and following a number of General Manager roles within MIM / Xstrata both in Australia and overseas and was appointed COO of Xstrata Zinc Australia. The major achievements at all the operations he was involved in was improved safety statistics and lower operations costs.