Our Management

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Bowo Kusnanto

President Director

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Gyaista Sampurno

Chief Geologist

Experience and Expertise

Bowo Kusnanto has over 25 years experience in the resources sector including 15 years in exploration managerial role of various both ASX, BEI listed companies; such as Freeport Mc Moran, Zinifex, Perilya, Oxiana/MMG, Tiger Realm Minerals, J Resources and Asiamet Resources. Kusnanto holds a bachelor in geology from UPN, he is an exploration geologist with solid technical background in a wide range of project stages from greenfield, brownfield and operating mine with proven track records for every project and position he held either in Indonesia or overseas. Bowo is KCMI member, competent person for exploration reporting of gold, copper and its associated minerals.

Experience and Expertise

Gyaista Sampurno has over 25 years experience in the resources sector including 5 years as Chief and Principal Geologist of J Resources. Sampurno is a strong field oriented and technology literate exploration geologist with solid overseas assignment background. He graduated from ITB in 1996 and since then had been taking field technical roles in genex, greenfield and brownfield exploration for deposit type of LSE, HSE, Porphyry and IOCG mostly with Newmont and J Resources Nusantara.

Technical Team

David Iswanto is a field-oriented with rounded experience Geologist in Generative and Greenfields to Brownfields detailed Exploration work equipped with strong understanding of various gold, copper, and base-metal deposit including Porphyry, High Sulphidation Epithermal, Intermediate Sulphidation Epithermal, Low Sulphidation Epithermal, Sediment Hosted, Skarn, Orogenic, mostly for gold, copper and other base-metal deposits. He has significant track record as part of Discovery Team at several prospects and significant contribution on incremental resources in several operation Gold Mines in Indonesia.

Experience and Expertise

Arief is a strong field oriented senior geologist with 12 year experience in great mastering in geological understanding, conceptualizing and executing exploration for complex deposit within greenfields, advanced and brownfields exploration program. He is a part of successful technical team at Pani Project, Doup, Bolangitang and generative exploration program in J Resources.

Experience and Expertise

Ahmad is a strong field oriented senior exploration geologist with 12 year round experience in exploration with strength in QAQC, generative exploration and technical due diligence for multi-commodity mostly for Nickel laterite, Bauxite and Coal.

Experience and Expertise

Technical Associate

Verrie Ilham has more than 25 years of experience in minerals processing industry; principal metallurgist. His expertise has been primarily in the gold, silver, copper and other base metals extraction in a variety of roles including plant metallurgist, analytical metallurgists, project metallurgist, and as a development manager (senior specialist). His experience in all aspects of the industry from site based, services and consultancy to provide holistic and practical solutions to his clients for major company such as Freeport, IMK, Rio Tinto, J Resources and Pama.

Experience and Expertise

Saut is a senior mine and resource geologist with experiencing from greenfield to brownfield geologist exploration, and project development with extensive in mine geology and mineral resource experience over the past 24 years with a solid background in mineral resources, mine production and project development in a small and large Au-Ag epithermal low sulphidation, and Au orogenic, Au high nugget narrow vein deposits, Cu-Au porphyry deposits, Cu-Zn base metal deposits, iron ore deposits. He is familiar with Mineral Resource Estimation (Linear and Non-Linear Estimation) for Underground and Open Pit mining using Vulcan, Isatis, and Supervisor mining software’s including estimation evaluations/review and audits, desktop study and due diligence. He has strong international assignment and was worked with Newmont, Oxiana, SRK, Quantitative Group, Evolution Mining and MMG. He is a competent person; CP (Geo) AusIMM for Mineral Resource Technical reporting for annual mineral resource report to ASX (Australia Stock Exchange).

Experience and Expertise

Patar Simbolon is a senior mine engineer with more than 15 years of experience in the surface (open cut/open pit/quarry) mining operation and consulting. His strong back ground is in coal and metal covering mine planning, drill and blast, mining fleet and its operation, production reporting, project cost and people management. Patar is familiar with mining software packages such as Mincom Minescape, Minex, Surpac, Whittle, Datamine, XPAC, Talpac, Micromine, and AutoCAD. He is certified as a Competent Person Indonesia (CPI) under the KCMI Code 2017 for Reserve Estimate Sign-off for Gold (and other related minerals) commodities.

Experience and Expertise
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Verrie Ilham, M.Sc.

Principal Metallurgist Copper and Gold

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Saut Simbolon, M.Sc.

Senior Resource Geologist

Copper and Gold

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Patar Simbolon, B.Eng.

Senior Mine Engineer

Copper and Gold

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Kartika Dwi Handayani

Principal Geologist


Kartika Dwi Handayani is an experienced senior coal geologist with more than 25 years experience covering various roles both technical and managerial in major national and multinational mining companies and mining services companies. Her experience includes detailed technical exploration work in greenfields, brownfields, resource estimation, mine operation, exploration project management and complex technical due diligence. She is resource geologist, member of AusIMM and is competent person under JORC code for coal Resource estimation reporting and sign-off.

Experience and Expertise
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David Iswanto

Senior Geologist

Copper and Gold

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Arief Eko Prihandoyo

Senior Geologist

Mineral Industry

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Ahmad Hidayat

Senior Geologist

Nickel and Bauxite