Our team ensures everything runs smoothly

Our governance

  • Barry Mckeown

    Barry is an experienced Mining, Maintenance and Engineering Management professional with over 30 years’ experience in the resources sector in Australia and Africa. His expertise extends to various commodities, including copper, gold, platinum, nickel and coal.

    Throughout his career, Barry has held leadership and operational positions with owner miners, contract miners and original equipment manufacturers (OEMs). He has gained extensive experience across all aspects of mining, including civil infrastructure, plant and equipment management, and operational management.

    Barry firmly believes that the well-being and safety of personnel, as well as the sustainability of projects, are pivotal to achieving operational success.

  • Tim Fuller

    Tim is an experienced mining professional with over 30 years in the industry, working across Australia and the Pacific and spanning multiple commodities and disciplines. His career includes senior managerial and operational roles across large-scale surface mining operations.

    Tim’s expertise lies in project management and operational leadership, with a strong focus on safe production, team development, and delivering results in complex environments. Throughout his career, Tim has led multidisciplinary teams across various stages of the mining lifecycle. His practical and strategic approach to operations management has enabled him to deliver consistent results in both greenfield and brownfield projects.

    As General Manager Operations at BUMA Australia, Tim is responsible for leading our site-based project teams. His focus is on uniting people under shared goals, driving operational excellence, ensuring mine safety, and meeting production and commercial targets.

    Tim is a firm believer in the power of clear, transparent leadership and effective communication to drive team performance. He fosters a culture of accountability and continuous improvement, empowering individuals to take ownership and contribute meaningfully to collective success.

  • Kate Van Kempen

    Kate is a seasoned People & Culture professional with over 16 years’ experience finding best-for-business solutions. Kate has senior leadership experience across a range of commodities, including coal, gold, iron ore and copper.

    Kate prides herself on her ability to harness the strengths and capabilities of teams to overcome complex challenges. She believes real value can be added to any organisation by proactive HR partnership which is backed by comprehensive data analytics.

    Kate has led multi-disciplined teams inclusive of training & development, talent acquisition, employment relations, data & reporting specialists, community, diversity & inclusion & HR operations. As part of her role, Kate is responsible for creating and executing People & Culture strategy across BUMA Australia.

  • Russell Moon

    Russell is a passionate Safety and Training professional with over 18 years’ experience working in both site-based and corporate leadership roles with both Contractor and Owner teams across the resources industry, including coal, gold, and drilling and completions within Australia.

    He and his team believe that an educated and engaged workforce is a safe and productive one. This belief drives their focus on developing employees, supervisors, and leaders in risk management thinking and application, ensuring the highest standards of safety and effective training practices are achieved.

    As part of his role, Russell is responsible for creating and executing the Health, Safety, and Training strategy across BUMA Australia.

Board of Directors

  • Colin Gilligan

    Colin has 30 years of experience in the resources sector, he has worked across all major mining jurisdictions worldwide throughout his career. Colin has developed and operated mining projects in many commodities including gold, copper, tantalite, lithium, mineral sands, graphite and coal. He has held operational, technical, executive and director roles throughout his career, as an owner and as a mining services provider in private and public companies.

    In his leadership at BUMA, Colin prioritises organisational excellence through people, culture, and efficiency, contributing to establishing BUMA as a prominent participant in the Australian mining industry. His extensive expertise covers operational, technical, governance, funding, risk management, and strategic matters.

  • Ashish Gupta

    Citizen of the Republic of India, born in 1975, domiciled in Singapore.

    Ashish Gupta has been serving as the Commissioner of PT Delta Dunia Makmur Tbk since August 2021. He possesses over 20 years of experience in corporate finance and investing across various industries, including financial services, technology, media, natural resources, and infrastructure.

    He joined Tiga Investments in 2019 as a Managing Director. Prior to this, he served as Managing Director and Partner at Farallon Capital Management from 2007 to 2019, where he played a pivotal role in most of the private credit and private equity investments of Farallon Asia. He began his career as an Investment Banker at Goldman Sachs.

    He obtained a Bachelor of Commerce (Hons) from Shri Ram College of Commerce, New Delhi, and a Post Graduate Diploma in Management from the Indian Institute of Management, Ahmedabad.

  • Ronald Sutardja

    Indonesian citizen, 56 years old, domiciled in Jakarta.

    Ronald Sutardja has been serving as the President Director of PT Delta Dunia Makmur Tbk since August 2021. He brings over a decade of CEO level experience, leading robust transformations in various multi national. He is known for his strategic vision, effective team leadership, and innovation.

    Before assuming his current position, he served as Vice President Director from 2012 and as President Director from 2014 at PT Bukit Makmur Mandiri Utama (BUMA), the subsidiary of PT Delta Dunia Makmur Tbk. His rich career also includes roles as Director at PT Trikomsel Oke Tbk, Head of Field Operations at Northstar Group, positions at Infineum Singapore Pte. Ltd., Michelin Malaysia, and Asia Pacific, as well as Booz, Allen & Hamilton Inc.

    Ronald earned a Bachelor’s Degree in Mechanical Engineering from the University of California at Berkeley, a Master of Science from the Massachusetts Institute of Technology, and a Master of Manufacturing Management from Northwestern University-Kellogg Graduate School of Management.

  • Dian Sofia Andyasuri

    Dian Sofia Andyasuri has been serving as the Director of PT Delta Dunia Makmur Tbk since June 2023. She brings over 22 years of experience from Indonesia, the United Kingdom, and Singapore in various financial roles across several industries, including telecommunications, oil & gas, consulting services, and utility companies.

    Before her tenure with the Company, she held positions at Thames Water, Hutchison, and Shell Indonesia, where she last served as President Director and Country Chair.

    She earned a Bachelor’s degree in Accounting from Trisakti University and a Master’s degree in Finance from Brunel University London.

  • Silfanny Bahar

    Indonesian citizen, 46 years old, domiciled in Jakarta. Silfanny Bahar serves as Director of PT Bukit Makmur Mandiri Utama (BUMA) since May 2023. With over 20 years of professional experience spanning financial analysis, modeling, governance, and assurance, she brings a wealth of expertise to her role.

    Prior to her current position at BUMA, Silfanny spent 11 years at Shell Indonesia, culminating in her role as Finance Director, responsible for financial planning, control, and risk management.

    Silfanny obtained a Bachelor’s Degree in Accounting from University of Indonesia.