Client Name: Glostar Indonesia
Location: West Java
Services Type: GHG Accounting & SBTi Validation
Standards:
- GHG Protocol Corporate Standard
- SBTi Corporate Net-Zero Standard
Challenge:
PT Glostar Indonesia, a key manufacturing partner within global supply chains, sought to strengthen its climate commitments and align with international standards. The main challenge involved establishing a robust and reliable GHG emissions baseline across entities, while ensuring alignment with the GHG Protocol and the requirements of the Science Based Targets initiative (SBTi). Additionally, limited visibility on emissions hotspots and the absence of a structured decarbonization pathway posed challenges in setting credible and science-based targets.
Solution:
Bestari supported Glostar by enhancing its GHG emissions inventory across their entities, ensuring methodological alignment with GHG Protocol and SBTi requirements. The work included identifying key emissions hotspots, improving data quality and consolidation processes, and developing a structured decarbonization roadmap. Bestari also provided technical support throughout the SBTi target-setting and validation process, ensuring that proposed targets were credible and compliant with international standards.
Result:
In September 2025, PT Glostar Indonesia successfully obtained SBTi approval for its near-term emissions reduction targets. This milestone reflects the company’s strengthened GHG accounting system, improved emissions transparency, and clear decarbonization pathway. It also reinforces Glostar’s position as a responsible and sustainable partner within global supply chains.
Meet the Experts:
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 Nailah Shabirah, Manager: [email protected]
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 Tatwadhika Rangin Siddhartha, Climate Strategy Project Lead: [email protected]
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 Dina Rahma Laila, Climate Strategy Senior Analyst: [email protected]
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 Rahma Khusniawati, Corporate Sustainability Analyst: [email protected]
Admin
Akil has over 3 years of combined experience across IT consulting, impact investing, and sustainability consulting. He mainly works to identify key business challenges and develop strategic solutions that create commercial value and positive impact. His experience spans business strategy, project development, and cross-sector collaboration, particularly in technology and sustainability initiatives. Akil earned a Business degree from the Bandung Institute of Technology.
Herlin works as policy research analyst assisting the Sustainable Packaging study and piloting program. She has been studying the plastic pollution issue for more than a year as part of Indonesia NPAP/WRI Indonesia and Bestari. Herlin’s interest is on public policy, environment, and human rights. She holds a degree in Law.
Widya has over 6 years of experience in financial administration. She has strong expertise in financial reporting, budgeting, and administrative processes. She ensures smooth operational and financial workflows, contributing to effective and accountable project implementation.
Daffa focuses on climate strategy communications and corporate sustainability engagement for over 1 year, helping companies translate climate ambition into measurable action. He crafts compelling narratives and simplifies complex climate concepts into clear, actionable strategies to ensure effective implementation and tracking. Daffa holds a Bachelor’s degree in English Literature from BSI University.
Rahma has practical experience across multiple industries, focusing on GHG inventories (ISO 14064 Verification Validation), and the implementation of various ISO standards. She has supported companies in improving environmental performance and aligning with sustainability goals. She holds a Bachelor’s degree in Environmental Engineering from Universitas Brawijaya.
Dina works across sustainability, environmental compliance, and climate action, supporting public and private sector projects in energy, transport, urban, and industry. With 7+ years of experience across consulting, NGOs, and multilateral institutions, she brings expertise in impact assessment, GHG accounting, and sustainability planning. Dina holds a degree in Environmental Engineering from Bandung Institute of Technology.
Almira is an environmental engineer with over six years of experience in waste management system design, circular economy strategy development, and community-based environmental projects. She holds a Master’s degree and a Professional Engineer certification, specializing in environmental management and technology. She also participated in a fellowship program at the Waste Management Department at Mecklenburg County, North Carolina.
Tatwa works at the intersection of corporate climate strategy and environmental science research. With 6+ years across consulting, corporate sustainability, policy, and ongoing PhD research in hydrothermal carbonization at Ghent University, Tatwa leads his team to help companies translate net zero ambitions into credible, data-driven decarbonization roadmaps.
Nailah has assisted holding companies and SMEs which have achieved SBTi validated net zero targets. With over 3 years experience at WRI Indonesia, she has been engaged with over 50 companies and possessed expertise ranging from GHG Accounting to science-based target setting. Nailah earned a Business degree from the Bandung Institute of Technology, including an exchange program at the University of Pennsylvania.
Tomi Haryadi serves as Director of Bestari Sustainability, leading strategy and delivery of climate, nature & circular economy solutions for companies across sectors. With 20+ years of experience in environmental programs across Asia, including roles with international organizations, he brings strong expertise in program management, partnerships, and sustainable development. He holds degrees in Chemistry from the University of Indonesia and Environmental Planning and Management from IHE Delft, the Netherlands.
Friska Sinuraya is an experienced Director of Operations with a demonstrated history of working in the non-profit organization management industry. Skilled in Management, Human Resources, Logistics Management, Finance, and Accounting. Strong operations professional with a Master of Science (MSc) focused in Strategic Management from Rotterdam School of Management, Erasmus University.
Tieke leads Human Resources at WRI Indonesia, bringing 20+ years of experience across international development and private sector organizations. With expertise in HR strategy, compliance, and organizational development, she has held senior roles at Save the Children, Coffey International, and P&G, and holds a degree in Public Law.
Anthony Utomo drives renewable energy initiatives at KADIN, advocating for policies that accelerate clean energy adoption and innovation. With leadership roles in the solar PV industry and as Managing Director of Utomodeck Group, he advances low-carbon solutions across manufacturing, mobility, and renewable project development while fostering international collaboration and sustainability.
Ary brings 15+ years of experience in planning, monitoring, evaluation, and learning across community development, climate change, governance, and social inclusion. With strong expertise in project design and risk analysis, he has supported initiatives with organizations such as UNDP and The Asia Foundation, and holds a degree in Communication Studies from Universitas Gadjah Mada.
Arief Wijaya is the Managing Director of WRI Indonesia with responsibilities to oversee programs in land use, climate, energy, cities, and oceans while advancing climate and forest initiatives. With expertise in forest landscape management, REDD+ MRV, and low-carbon development, he holds a PhD in Geoinformatics from TU Bergakademie Freiberg and an MSc from ITC Netherlands.