Our Team
Polman
Founding Partner
Polman has spent more than three decades building a distinguished career across public service and strategic business leadership in Indonesia’s key sectors.
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He began his professional journey at the Ministry of Finance of the Republic of Indonesia and later continued at the Ministry of State-Owned Enterprises, where he gained deep institutional insight into national economic policy, governance, and sector development. Over the years, he has held various commissioner and board-level positions within state-owned and industrial enterprises, strengthening governance frameworks and advancing strategic initiatives.
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Among these, he served for six years as Commissioner at PT Indra Karya (Persero), a state-owned enterprise specializing in Engineering, Development, and Industry, where he contributed to the company's oversight and strategic direction.Â
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His leadership further expanded into the mining and industrial sector, serving as Director of Business Development and later as President Director of PT Nasional Hijau Lestari, a subsidiary of MIND ID. His extensive background in infrastructure, logistics, and strategic industries reflects his ability to drive growth and innovation across diverse business environments.
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He is widely recognized for his strong network across government institutions, state-owned enterprises, and private sector leaders, enabling him to align stakeholders and facilitate strategic collaborations across industries.
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Drawing on this breadth of experience, he founded Polman & Partners Consulting Group (PCG) to connect institutional insight with practical business strategy, delivering strategic advisory services across Indonesia’s evolving sectors.
Renhard Immanuel
Managing Partner
Renhard is a seasoned executive with cross-sector experience spanning financial services, energy, trading, and logistics. He began his career as a Relationship Manager for Citigold at Citibank for years, where he developed expertise in client advisory and financial portfolio management.
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Afterwards, he transitioned into the energy sector, serving as Assistant Vice President of Commerce at Karadeniz Energy Group. In this role, he contributed to strategic planning and business development initiatives within complex energy markets. Concurrently, he held the position of Vice President of Commerce at Lawu Energy Pte. Ltd., a subsidiary of Liannex Corporation.
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His professional credentials include certifications such as Wakil Manajer Investasi, AAJI from the Indonesian Life Insurance Association, and WAPERD from the Financial Services Authority of Indonesia, reflecting a strong foundation in capital markets and financial advisory.
In addition to his corporate experience, he has managed a successful food and beverage enterprise since 2017, demonstrating practical entrepreneurial capability alongside institutional leadership.
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At PCG, he oversees operational strategy and business development, supporting clients in structuring transactions, developing commercial strategies, and driving sector-focused growth initiatives.
Our Team of Experts:
S P Tulus Sihombing
Expert in Energy & Engineering
S.P. Tulus Sihombing is a seasoned geological engineer with more than 25 years of professional experience in mineral and energy exploration across Indonesia. A graduate of the Institute of Technology Bandung with a Bachelor’s degree in Geological Engineering, he has led and executed exploration programs for gold, coal, and base metal projects nationwide.
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His expertise spans field mapping, core logging, geochemical analysis, prospect generation, and resource development, supported by advanced project management capabilities. He has held senior roles with leading mining companies, including PT Indo Muro Kencana and PT Kasongan Bumi Kencana, where he served as Exploration Manager overseeing resource expansion, drilling programs, and strategic project planning in Central Kalimantan.
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Earlier in his career, he held senior exploration geologist positions at PT RPM Exploration Consulting and PT Dairi Prima Mineral, supervising large-scale drilling operations, delineating mineral resources, and contributing to feasibility studies. His experience also includes major coal and gold projects across Sumatra, Kalimantan, Aceh, and Papua, including work with PT Antam Resourcindo and Austindo Mining Corporation.
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Tulus is highly skilled in geological data analysis, GIS and remote sensing applications, and the preparation of comprehensive technical reports. His career reflects both technical depth and leadership, strengthened by specialized training in structural geology, soil geochemistry, and safety, as well as active membership in the Indonesian Geologists Association (IAGI).
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At PCG, he provides technical advisory across mining and mineral exploration matters. He supports clients at various stages of project development, from early-stage assessment to resource definition and development strategy.
A. Rifky Zarkoni
Expert in Corporate Finance & Transaction Advisory
Rifky is a senior corporate finance and investment banking professional with over two decades of experience across Indonesia’s capital markets, infrastructure, and energy sectors.
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He most recently served as Vice President at BNI Sekuritas until April 2023, where he led Strategic Advisory Services for state-owned enterprises within the Investment Banking division. He advised SOEs on financial restructuring, credit rating strategy, fundraising structures, asset-backed securities, and complex capital market transactions across sectors including energy, infrastructure, pharmaceuticals, cement, mining, and petrochemicals. His clients included PT Perusahaan Gas Negara (PGN), PT Kimia Farma Tbk, PT Bio Farma, PT Bukit Asam Tbk, and PT Semen Indonesia Group Tbk.
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Previously, Rifky was Director of Corporate Finance at KCT Group, where he led fundraising, M&A, and IPO planning for a maritime and shipbuilding operator serving multinational oil and gas clients including Total, BP Tangguh, and Chevron. He also provided advisory services to SOEs including PT Rajawali Nusantara Indonesia (RNI) and PT Brantas Abipraya.
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Earlier, he held director-level positions within the business group of Hapsoro Sukmonodihadi (RAJA Group / HEPI Group), including PT Rukun Raharja Tbk and PT Capital Turbines Indonesia, leading M&A, fundraising, and energy infrastructure initiatives.
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He began his investment banking career at Capital Managers Asia (Bakrie Group), where he was involved in major transactions including the Kanci–Pejagan toll road project within the Trans Java Toll Road network, overseeing concession structuring, financing of approximately IDR 1.4 trillion, and project execution. He also contributed to IPOs, bond issuances, and media acquisitions.
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Rifky started his career at PT PEFINDO as a Senior Analyst covering corporate credit ratings across multiple industries.
Rifky is recognized for his ability to navigate complex financial structures, drive strategic transactions, and deliver results across high-stakes, multi-sector engagements.
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At PCG, he provides strategic financial and corporate advisory services, advising clients on fundraising, M&A, and deal structuring.
Bagya Mulyanto
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Expert in Corporate Strategy, Governance & Financial Leadership
Bagya Mulyanto is a highly respected business leader and strategic advisor with more than three decades of experience at the highest levels of Indonesia's state-owned enterprise (BUMN) sector. Throughout his career, he has played a key role in shaping corporate strategy, strengthening governance frameworks, and leading large-scale organizations across some of Indonesia's most important industries.
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His distinguished public service career includes serving as Assistant Deputy (ASDEP) for Mining, Strategic Industry, and Media at the Ministry of State-Owned Enterprises (BUMNs), where he oversaw planning, performance monitoring, investment strategy, corporate governance, and risk management across major national enterprises. In this capacity, he contributed to the development and oversight of strategic sectors critical to Indonesia's economic growth and national development.
He subsequently held a number of senior executive positions, including President Director of PT Perkebunan Nusantara VIII, one of Indonesia's leading plantation companies. He also served at Perum BULOG, Indonesia's national food logistics agency, first as Director of Human Resources and General Affairs and later as Director of Finance, where he was responsible for managing complex organizational and financial operations within one of the country's most important public institutions.
Beyond executive leadership, Bagya has been entrusted with numerous governance and oversight responsibilities. He served as Chief Commissioner of PT Mitra BUMDes Nusantara and chaired audit committees across several prominent state-owned enterprises (BUMNs), including PT Bahana Pembina Usaha Indonesia, PT Semen Baturaja, and PT Hotel Indonesia Natour helping strengthen accountability, transparency, and corporate performance at the board level.
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His leadership and expertise have earned widespread recognition, including multiple national awards recognizing excellence in financial leadership and corporate management. Known for his deep understanding of governance, finance, and organizational transformation, he has built a reputation as a trusted advisor to both public and private sector stakeholders.
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At PCG, he combines more than three decades of executive leadership, corporate governance expertise, and financial management experience to provide high-level strategic advisory services. Drawing on his experience at the highest levels of government and state-owned enterprises, he helps clients strengthen governance, optimize performance, manage risk, and achieve sustainable business growth.
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Bayu Firdaus
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Expert in Energy & Engineering
Bayu Firdaus, A.Md., ST., MMSI, is an experienced professional in Indonesia’s oil and gas sector with more than a decade of hands-on involvement in planning, engineering, and operational execution. He currently serves as a Technical Expert Committee Member at BPH Migas, contributing technical insight within Indonesia’s downstream regulatory framework and supporting the development of industry standards and oversight mechanisms.
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His professional experience includes senior roles at PT PGAS Solution, where he worked from 2010 to 2018, and a managerial position at PT Nasional Hijau Lestari from 2018 to 2022. In these roles, he contributed to engineering operations, project planning, and business development initiatives, particularly within infrastructure and energy-related environments. His competencies cover occupational safety, environmental management, and construction supervision, supported by certifications from the National Certification Body.
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Bayu holds a Master’s degree in Information Systems Management, a Bachelor’s degree in Civil Engineering, and an Associate degree in Construction Management.
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At PCG, he provides technical advisory and operational insight across energy, infrastructure, and regulatory-related engagements. He supports clients in navigating complex technical and compliance requirements, bringing a practical and structured approach to problem-solving.
Aditya Harsa Widyatama
Expert in Commercial & Supply Chain Strategy
Aditya is a seasoned Sales and Marketing executive and Supply Chain professional with extensive international experience across FMCG, automotive, mining, transportation, and education sectors. His career reflects a consistent focus on operational excellence, commercial strategy, and cross-border business development.
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He holds a Master of International Business and a Graduate Certificate in International Business from Deakin University, as well as a Bachelor of Technology in Manufacturing Technology from Monash University and an Associate Diploma of Engineering in Manufacturing from Swinburne University.
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Throughout his career, he has held senior leadership and operational roles across Australia and Southeast Asia, including Managing Director of PT Hasitama Mandiri Indonesia and regional positions with Caterpillar in Jakarta and Singapore. His experience spans production control, supply chain planning, commercial territory management, and business development across multinational and industrial environments.
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At PCG, Aditya provides advisory on sales strategy, operational optimization, and supply chain integration. He brings a structured, data-driven approach and an international perspective to support clients operating in complex and competitive markets.
Wawa Jaka Sungkawa
Expert in Mining Reserve & Resource Development
Wawa Jaka Sungkawa holds a Bachelor’s degree in Mining Engineering from Institut Teknologi Bandung and a Master’s degree in Management from Prasetya Mulya Business School. He has completed extensive professional training in mine planning, blasting, hydrology, safety management, and environmental compliance, and has served as a keynote speaker and guest lecturer at leading Indonesian universities and mining forums.
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With more than 28 years of experience, he brings a rare combination of technical mining expertise, strategic leadership, and regulatory engagement. He began his career in granite mining before joining PT Freeport Indonesia, where he progressed from mine planning and ore control at the Grasberg mine in Papua to roles in government relations and copper concentrate marketing in Jakarta.
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At Freeport-McMoRan’s corporate headquarters in Phoenix, Arizona, he worked within the Strategic Planning and Ore Reserve team, overseeing global mine planning, cost analysis, and reserve reporting across operations in the United States, Chile, Peru, and the Democratic Republic of Congo.
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His executive roles have included President Director of PT Indotan Lombok Barat Bangkit and Director of Sales and Services at PT Multi Nitrotama Kimia, as well as Technical Advisor to PT Indotan Group.
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At PCG, he provides strategic guidance on mining operations, resource development, and sector engagement. He advises clients across different stages of the mining project lifecycle, helping them navigate technical, commercial, and regulatory considerations.
Benny S. Anwar
Expert in Corporate Finance & Capital Markets
Benny is a senior corporate finance and capital markets professional with over three decades of experience across investment banking, restructuring, and treasury functions. He has held senior leadership roles including Finance Director at PT Krida Jaringan Nusantara Tbk., Vice President of Corporate Finance at PT Lotus Andalan Sekuritas, and Head of Corporate Finance at PNM Investment Management, a subsidiary of PNM Persero.
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He has extensive experience advising on and supporting initial public offerings (IPO) for both equity and debt instruments, corporate restructuring, disposal programs, and capital raising through banking and capital markets. Over the course of his investment banking career, he has been involved in numerous IPO transactions on the Indonesia Stock Exchange across a wide range of sectors, including consumer, healthcare, energy, shipping, financial services, and real estate. These include companies such as PT Mulia Boga Raya Tbk (KEJU), PT Hotel Fitra International Tbk (FITT), PT Citra Putra Realty Tbk (CLAY), PT Mega Perintis Tbk (ZONE), PT Jaya Sukses Makmur Sentosa Tbk (RISE), PT Prima Cakrawala Abadi Tbk (PCAR), PT Trisula Textile Industries Tbk (BELL), PT Alfa Energi Investama Tbk (FIRE), and PT Sariguna Primatirta Tbk, among others.
In addition to IPOs, Anwar has advised on and supported multiple bond issuances and medium-term note (MTN) programs, including transactions exceeding IDR 500 billion and USD-denominated financings for infrastructure and corporate projects. His experience also includes project finance and structured financing, including arranging and supporting financing initiatives such as an approximately USD 180 million coal mining project finance transaction and other cross-sector funding mandates.
Earlier in his career, Anwar played a key role in major asset disposal and restructuring programs under the Indonesian Bank Restructuring Agency (IBRA), contributing to high-profile transactions including the restructuring and divestment of PT Indosiar Visual Mandiri and other strategic assets. He also began his career in banking as a treasury dealer, gaining hands-on experience in money markets, bonds, and commercial paper.
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In recent years, Anwar has advised corporate groups on restructuring, IPO readiness, and strategic transactions, including M&A and financing initiatives across equity, mezzanine, and bank funding structures.
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At PCG, Anwar provides strategic financial and corporate advisory services, advising clients on capital raising, restructuring, and transaction strategy to support informed decision-making.
Jerry Panggabean
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Expert in Strategic Investment, Government Relations, and Market Entry in Indonesia
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Jerry Panggabean is a business development and government relations professional with over 15 years of experience across Indonesia’s financial services and strategic sectors, including infrastructure, mining, renewable energy, and defense. He has built a strong track record in supporting large-scale projects and enabling market expansion for both multinational corporations and local partners. Throughout his career, Jerry has held key roles at organizations such as Caterpillar Financial Services, Mitsubishi UFJ Lease and Finance, and Hexa Finance Indonesia. In these positions, he led market entry strategies, structured financing solutions, and managed relationships with government institutions and major corporate clients. His work often sits at the intersection of commercial growth and regulatory compliance, allowing businesses to operate effectively within Indonesia’s complex policy environment. Currently a Senior Consultant at Bright Indonesia International, Jerry advises international companies entering Indonesia by providing market insights, regulatory guidance, and stakeholder engagement strategies. He has contributed to multimillion-dollar deals and facilitated partnerships across industries.
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He holds a Master’s degree in International Business Administration from Bournemouth University and brings a practical, results-focused approach to driving sustainable business growth.
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At PCG, Jerry provides strategic advisory services to clients seeking to enter or expand in Indonesia, combining expertise in business development, government relations, and regulatory navigation. He supports market entry strategy, stakeholder engagement, and partnership development, ensuring alignment with local regulations and industry dynamics. Drawing on his experience and network across government and private sectors, Jerry helps clients identify opportunities, mitigate risks, and achieve sustainable long-term growth.
Alpin Wu
Expert in Engineering Consultancy & Power Systems
Alpin Wu is a seasoned engineering consultant and business leader with over three decades of experience in power systems, industrial management, and technical advisory across Indonesia and China. With a Bachelor of Applied Science in Electrical & Electronics Engineering from Chung Yuan Christian University (Taiwan) and an MBA, Alpin has managed high-voltage power infrastructure, optimized large-scale industrial operations, and led energy conservation initiatives across some of the region's most demanding environments.
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His career spans landmark roles at ABB Sakti Industri in North Sumatra, APP Pindo Deli Pulp & Paper Mills in West Java, and Lian Zhong Stainless Steel in Guangzhou.
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Alpin has a proven track record of developing high-performing teams and delivering practical solutions to complex engineering and operational challenges. As a founding figure in establishing ABB's Medan branch office and service centre, and having led large-scale engineering and maintenance operations at one of Indonesia's largest pulp and paper mills, he brings firsthand expertise in building and scaling operations in the Indonesian industrial landscape.
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Alpin is a multilingual professional fluent in Indonesian, Chinese, English, and Hokkien, Alpin operates seamlessly across cultures and industries throughout Asia.
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In PCG, Alpin Wu will lead the delivery of engineering consultancy, management advisory, and professional technical services, driving operational excellence through expert guidance and strategic insight.
Halmar Sihombing
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Expert in Mining Planning & Operations
Halmar Sihombing is a mining professional with more than three decades of experience across coal, iron ore, and gold operations, supported by early expertise in oil and gas exploration. He graduated in Mining Engineering from Institut Teknologi Bandung, where his thesis focused on seismic interpretation and hydrocarbon reserve analysis in South Sumatra. He later obtained certification as Kepala Teknik Tambang (KTT), qualifying him to lead technical and safety operations at the highest operational level.
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He began his career at Kaltim Prima Coal, managing large-scale overburden removal, coal extraction, and haul road development to port facilities. He subsequently held senior engineering and supervisory roles across multiple mining companies, overseeing underground and open-pit operations, crusher and port facility commissioning, mine design, and logistics coordination.
From 1998 to 2005, he served as Project Coordinator for coal crusher and port infrastructure development, integrating major mechanical and control systems. Later, as Planning and Schedule Manager at Strait Asia Mineral (Sebuku), he supervised contractors, managed production scheduling and blending, and led safety and technical operations.
Since 2005, he has also acted as a mining consultant, preparing feasibility studies for coal, iron ore, and gold projects across Indonesia.
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At PCG, he provides technical and operational advisory across mining development, project planning, and safety management. He supports clients in evaluating project feasibility, improving operational performance, and aligning with regulatory and industry standards.
Nova Negara Silaban
Expert in Shipping & Logistics
Nova Negara Silaban is an executive with more than three decades of experience in international shipping and logistics across Indonesia and Southeast Asia. He holds a Bachelor of Science in Finance and Marketing from the University of Oregon and has built his career within leading maritime and shipping organizations in the region.
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Since 2009, he has served as President Director of PT Linc Bintang Line, a joint venture between Bintang Baja Group and Lautan Luas Group. In this role, he oversees commercial and operational shipping activities and leads the company’s broader business strategy. He also serves as Commissioner of PT Bintang Baja Sinar Cemerlang, providing strategic oversight in shipping negotiations and operational governance.
Earlier in his career, he held senior leadership roles including Managing Director of PT Bintang Anugerah Wahana Sejati, where he managed long-term shipping contracts for coal and fertilizer transport, and Commercial Manager at PT Taruna Cipta Kencana (Sinar Mas Group), supervising tanker and bulk carrier operations for palm oil and general cargo shipments. He also gained regional experience in chartering and maritime operations with PT Gesuri Lloyd and Transsamudera Sdn Bhd in Malaysia.
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At PCG, he provides strategic advisory on maritime operations, contract structuring, and logistics strategy. He supports clients in navigating commercial and operational considerations across shipping and trade-related activities.
Dedy Irawan MT Marpaung
Expert in Engineering Project Management & MEP Systems
Deddy is an engineering and project management professional with over two decades of experience across technical consulting, infrastructure development, and operational management. He holds a Bachelor’s degree in Electrical Engineering and a Master’s degree in Marketing Management, combining technical expertise with practical business and operational insight.
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He has held progressive roles within engineering consulting firms, including serving as President Director of PT Natagraha Consulindo, where he led technical and management consulting projects. Throughout his career, he has been involved in project planning, operational management, and the delivery of engineering consultancy services across multiple sectors.
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In recent years, Deddy has specialized in Mechanical, Electrical, and Plumbing (MEP) systems, serving as a technical expert on various infrastructure and public development projects. His experience includes involvement in the development of government and institutional facilities, including residential and public infrastructure projects such as the TNI AU Halim Perdanakusuma housing development, academic facilities at IAIN Metro Lampung, and public market infrastructure projects in Dharmasraya, West Sumatra.
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In addition to his engineering background, Deddy has experience in business operations, marketing, and project administration across industries including manufacturing, automotive, agribusiness, and property development. This multidisciplinary background enables him to approach projects with both technical precision and practical operational understanding.
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At PCG, Deddy supports engineering and project-related advisory, providing technical insight and operational perspective to support project planning and execution readiness.
Andi Erwin Syarif
Expert in ESG, Risk Management & Environmental Compliance for Mining and Energy Projects
With over 25 years of experience across Indonesia's mining, energy, manufacturing, and construction sectors, Andi brings deep, hands-on expertise in Environmental Social Governance (ESG), Enterprise Risk Management, and sustainable resource development. He holds a Doctorate in Civil and Environmental Engineering from Ehime University (Japan), a Master's in Management and Industrial Engineering from ITB, and a Bachelor's in Mechanical Engineering from Hasanuddin University.
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His career spans leadership roles with major industry players including PT Vale Indonesia, PT International Nickel Indonesia, PT Freeport Indonesia, and Sumitomo Metal Mining, as well as advisory engagements with the World Bank, Morningstar Japan, and Indonesia's Directorate General of Mineral and Coal. His work has covered ESG risk rating frameworks, Environmental and Social Impact Assessments (ESIA), land acquisition and resettlement planning (LARAP), post-mining redevelopment, and Just Energy Transition initiatives — often aligned with IFC and World Bank standards.
Currently serving as Research Advisor and Independent Consultant, he most recently led risk management activities for a biomass and green energy transition project with PT Vale Indonesia. He is a Certified Risk Management Professional, Project Management Professional, and holds certifications in ISO 31000 Risk Management, ESIA, and GRI sustainability reporting, among others.
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Beyond his consulting work, he serves on the Expert Council (Dewan Pakar) of the Association of Indonesia Mining Professionals (PERHAPI) and has held leadership positions with the Institution of Engineers, Indonesia (PII). He is a recipient of the Monbukagakusho Scholarship and was recognized with the Best ESG Participant Award by the Corporate Finance Institute.
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At PCG, he applies his engineering and technical consultancy expertise in ESG, risk management, and environmental compliance to mining, energy, and industrial clients. Drawing on experience with the World Bank and major mining operators, he supports ESIA, land acquisition planning, and post-mining strategies, aligning international engineering standards with Indonesian regulatory requirements.
Reygina Mitrania
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Regulatory & International Advisory
Reygina is a licensed advocate admitted to the Indonesian Bar Association (PERADI) since 2021, with an academic focus on international law, particularly international trade and human rights law.
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She graduated with honours from her Bachelor of Laws before completing a Master of Laws (LLM) at the University of Melbourne.
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During her postgraduate studies, she developed particular strength in international law and global governance. Her academic work engages with contemporary legal challenges, including the development of frameworks for sustainable futures, the regulation of rapidly evolving AI systems, and the persistence of unconscious bias in shaping gendered economic roles. She has also examined domestic trade policies and international obligations, including analysis of the WTO dispute settlement system.
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During her postgraduate studies, she served as a paralegal at Refugee Legal, Australia’s largest provider of free specialist legal assistance to people seeking asylum, refugees, and disadvantaged migrants. In this role, she assisted with case preparation, conducted legal research, and liaised directly with clients to verify critical information, often working through interpreters to ensure accuracy in cross-cultural communication.
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Currently, she works as a Legal Fellow at Blueprint for Free Speech in Melbourne, contributing to legal and policy research on whistleblower protection, regulatory reform, and the intersection of artificial intelligence and law. Her work includes legislative analysis, comparative research, and the evaluation of emerging governance challenges.
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Her earlier professional experience includes work at Indonesian law firms, where she was involved in both corporate practice and litigation, including private and criminal law matters.
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At PCG, Reygina provides regulatory and cross-border advisory support, assisting clients in navigating complex legal and institutional frameworks. She adopts a structured and analytical approach to regulatory challenges, supporting risk assessment and enabling clients to operate effectively within evolving legal environments.
Sabar Oktorio Pakpahan
Expert in Engineering Consultancy & Power Systems
Sabar Oktorio Pakpahan is a metallurgical engineer with more than 20 years of experience in gold processing and extractive metallurgy. A graduate of Institut Teknologi Bandung, he has built his career across leading mining and mineral processing operations in Indonesia and internationally.
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He currently serves as Head Office Metallurgy Manager within the Mineral Division of the Gajah Tunggal Group, overseeing metallurgical strategy across multiple gold mining operations, including Kasongan Bumi Kencana and Indo Muro Kencana. His responsibilities include plant performance optimization, production planning, metallurgical accounting, and technical advisory to senior leadership.
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His experience spans crushing and grinding circuits, leaching and CIL/CIP systems, elution, Merrill-Crowe processes, electrowinning, and tailings management. He has led plant refurbishments, commissioning programs, and recovery optimization initiatives, consistently improving gold and silver recoveries while strengthening cost efficiency and operational discipline.
Earlier in his career, he held engineering and project roles within mining, EPC, and blasting service companies, building a comprehensive understanding of mineral processing operations from design through execution.
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At PCG, Sabar provides technical advisory on process plant optimization, metallurgical evaluation, and feasibility assessment for gold and mineral projects. He supports clients in improving operational performance through data-driven analysis and practical engineering insight.