Board of Directors

Jocelyn Severyn de Warrenne Waller MA (Hons) (Cantab)

Jocelyn Severyn de Warrenne Waller

Non-Executive Chairman

Jocelyn Waller is a British national who is a founding shareholder and Director of the Company. Mr Waller graduated from Churchill College, Cambridge with a Master of Arts in History in 1965 and has since spent his entire career in the mining industry. 

For 22 years he worked for the Anglo American group and was involved variously with tin mining (Malaysia and Thailand), copper/cobalt (Zaire), potash (UK), tungsten (Portugal), exploration and metal sales (London).

In 1989 he set up Avocet Mining plc ('Avocet') and as CEO developed the Penjom gold mine in Malaysia and listed Avocet on the London Stock Exchange. In 2000 he set up Trans-Siberian Gold plc ('TSG') to develop gold projects in Eastern Russia listing TSG on the AIM market of the LSE in 2003.

Robert Gregory  B. Eng (Mining Engineering)

Managing Director

A qualified mining engineer with more than 30 years' experience in the mining industry, Robert Gregory’s expertise covers both underground and open pit mining as well as multiple commodities including gold, copper, nickel and coal. He has extensive international experience including Indonesia, the Philippines, China and Papua New Guinea.

Prior to joining Sumatra Copper & Gold, Mr Gregory was Chief Operating Officer at Medusa’s Philippines operations where he was instrumental in increasing underground productivity. He brings a structured and disciplined approach having worked in large operations such as Medusa’s Co-O mine, the Porgera gold mine in PNG (currently owned and operated by Barrick Gold Corporation) and the Granny Smith gold mine (currently owned and operated by Goldfields).

Mr Gregory holds a Bachelor of Engineering (Mining) Honors from the University of NSW.


Adi Sjoekri Bsc Msc, MBA (Management)

Adi Sjoekri

Director of Government Liaison, Permitting and Forestry

Adi Sjoekri is an Indonesian National and graduated with degree and a Master of Science in Geology from the Colorado School of Mines in the USA. He completed his further education with an MBA in management at Monash University in Jakarta.

Mr Sjoekri has more than 17 years’ experience working for major companies such as CSR and Newmont throughout Indonesia and more recently as a successful consultant to the mining industry. He was instrumental in recognising the opportunity to acquire mineral tenements in Sumatra in 2006.


David Fowler B.Bus, Chartered Accountant, Post Grad Dip Finance & Investment 

Non-Executive Director

David Fowler is a highly experienced corporate finance executive with more than 25 years’ experience working in the mining industry in Asia, South America and Australia.

Mr Fowler previously served as Chief Executive Officer and Director of Orosur Mining Inc.  Mr Fowler is currently a director of Merdeka Copper Gold Tbk.


Gavin Caudle B.Com Finance & Law, Chartered Accountant

Non-Executive Director

Mr Caudle is Perth born and educated and has over 20 years' experience in the finance and investment sectors in Australia, Singapore and Indonesia.  He joins the Board as the representative of Sumatra's major shareholder and cornerstone investor, Provident Minerals Pte Ltd.

Since 2003, together with his partners, Mr Caudle has developed numerous successful businesses in Indonesia including Tower Bersama Group (a telecommunications infrastructure business) and Provident Agro (a plantation business) with assets currently valued in excess of $4 billion.  Mr Caudle was previously a partner in Arthur Andersen Jakarta Office and Country Head of the Investment Bank Salomon Smith Barney for Indonesia.

Mr Caudle is currently a Director of Provident Capital Partners Pte Ltd and a Non-Executive Director of two other ASX-listed resource companies, Finders Resources Limited and Sihayo Gold Limited. Mr Caudle is a director of Merdeka Copper Gold Tbk.


Andy Robb
 BSc Mining Engineering, FAusIMM

Non-Executive Director

Mr Robb is a mining engineer with significant international experience and a proven track record in mining operations for companies such as WMC Resources/BHP Billiton (Group Manager of Technical Services), Placer Dome (Mine Manager of the Kanowna Belle Gold Mine), MIM Holdings and Mount Isa Mines. Mr Robb recently returned from a 3 year assignment in Argentina as Project Director/VP South America for the Enirgi Group. As a former Principal Mining Engineer at AMC Consultants in both London and Perth, Mr Robb has a breadth of knowledge across all aspects of project development, project execution and operations.


Susan Hunter
 BCom Accounting & Finance, Fellow FSIA, Member AICD, Member AICSA and Chartered Secretaries Australia

Company Secretary

Ms. Hunter has nearly 20 years' experience in the corporate finance industry.  She is founder and Managing Director of consulting firm Hunter Corporate Pty. Ltd., which specialises in the provision of corporate governance and company secretarial advice to ASX listed entities, and previously held senior management roles at Ernst & Young, PriceWaterhouseCoopers and Bankwest, both in Perth and Sydney.

Ms. Hunter holds a Bachelor of Commerce degree majoring in accounting and finance, is a Fellow of the Financial Services Institute of Australasia, a Graduate Member of the Australian Institute of Company Directors and a Member of the Australian Institute of Chartered Secretaries and Administrators and Chartered Secretaries Australia.