Director Profiles

Dr Denis Clarke

BSc, BA, PhD, FAIMM (Non-Executive Chairman) (Appointed 1 April 1999)

Dr Denis Clarke has more than 40 years’ experience in exploration and mining operations. Over 15 years with Plutonic Resources (“Plutonic”), he contributed significantly at the General Manager level to its success as it developed from a small explorer in 1983 to one of Australia’s largest gold miners prior to its take-over in 1998 in a transaction which valued Plutonic at $1 billion. Dr Clarke at various times managed the exploration, finance, administration and corporate divisions. He subsequently was a director and consultant to Troy Resources Limited for eleven years as it developed from explorer to a successful international gold miner. During the past three years Dr Clarke has been Chairman or Non-Executive Director of the following listed companies:

  • LionGold Corp Ltd (from 1 October 2012 to present)
  • Hill End Gold Limited (from 25 February 2010 to present)
  • Signature Metals Limited (from 14 September 2012 to present)

Dr Chris Ringrose

BSc, PhD, MBA, MAIMM, MAICD (Managing Director) (Appointed 19 June 2003)

Dr Chris Ringrose has been an exploration geologist based mainly in Western Australia since he completed his geology degrees in Scotland in 1982. His career has included experience with EZ, Chevron and Aztec, and prior to joining Cullen, he was Exploration Manager with Troy Resources NL for nine years. Dr Ringrose has also completed an MBA at Deakin University and brings to the Company significant management, exploration and project evaluation experience gained both in Australia and overseas. Dr Ringrose has had no other directorships of listed companies in the last three years.


Grahame Hamilton

BSc, MSc, MAIG (Non-Executive Director) (Appointed 1 April 1999)

Mr Grahame Hamilton, a graduate of the University of NSW, has extensive experience over 30 years in exploration, corporate and project management. He has wide ranging expertise in project evaluation. Between 1994 and 1996 he managed the Brocks Creek exploration, environmental impact statement, feasibility study, mine development and construction for Solomon Pacific Resources NL. Before Solomon, Mr Hamilton worked with Getty Oil Development Co. – Minerals Division as Queensland Manager. Mr Hamilton had been a director of AIM-listed public company Mariana Resources Limited until his resignation on 28 November 2008.


John Horsburgh

BSc, MSc, FAIMM (Non-Executive Director) (Appointed 1 April 1999)

Mr John Horsburgh, a graduate of the Royal School of Mines, has over 32 years industry experience including 11 years with Solomon Pacific Resources NL. Prior to this he gained extensive experience in Australia and overseas with Getty Oil Development Co., Billiton and RTZ Group. Mr Horsburgh is Executive Chairman of AIM-listed public company Mariana Resources Limited.


Wayne John Kernaghan

BBus, ACA, FAICD, ACIS (Non-Executive Director and Company Secretary) (Appointed 11 November 1997)

Mr Wayne Kernaghan is a member of the Institute of Chartered Accountants in Australia with a number of years experience in various areas of the mining industry. He is also a Fellow of the Australian Institute of Company Directors. During the past three years Mr Kernaghan has held, and is currently a director and holds, the following listed company directorships:

  • Gulf Industrials Limited (from 30 June 2005 to present)
  • South American Ferro Metals Limited (from 26 June 2013 to 24 April 2015)