Works where business strategy meets public policy — shaped by strategy roles at PT PLN and engagements across national and Jakarta government. He leads the practice and every client relationship.
About Us
ESG practitioners, not just advisors.
We are a team of sustainability specialists who have sat on both sides of the table — building emissions inventories, setting science-based targets, and answering to boards, regulators, and rating agencies. That hands-on experience is what we bring to every engagement, and what lets your team carry the work forward once we step back.
Expertise you can interrogate.
Every framework we work in — the GHG Protocol, IFRS S1 & S2, GRI, CDP, EcoVadis, MSCI — we have implemented end to end, not just read about. We know where the data is hard to get, where the assumptions hide, and where an assessor will push back.
So nothing we hand over is a black box. We show our working, explain our choices, and make sure someone on your team can defend every number long after our engagement ends. Depth, not just deliverables.
A decade in the field.
Why it matters
Long before Nusa Tera Inspira, our team was already in the field — building the GHG inventories, decarbonisation pathways, and ESG systems behind demanding corporate mandates. That hands-on track record is what we carry into every engagement.
10yrs
Of combined experience in the field, not just the boardroom.
20+
Corporate GHG & ESG engagements delivered end to end.
350+
Entities measured across group & holding structures.
3
Regions — Indonesia, Europe & the Middle East.
Sectors we have worked across
Energy & Utilities
Manufacturing & Heavy Industry
FMCG & Consumer Goods
Shipping & Logistics
Real Estate & Buildings
Financial Services
Fisheries & Agriculture
Cement & Construction
Pharmaceuticals
Retail & Apparel
Tourism & Hospitality
State-Owned Enterprises
People behind Nusa Tera Inspira
An environmental economist who coordinates UNIDO's net-zero partnership for industrial decarbonisation in Indonesia, with a background spanning climate research, banking, and software. He owns the technical backbone of our work.
Cecep HermawanDirector
A sustainability PhD who has built GHG inventories and net-zero pathways from Southpole to Astra's operations — the rigour behind every number we hand over.
Tatwa R. SiddharthaGHG Decarbonization Expert
Has run sustainability from the inside — leading it at Rumah Atsiri and delivering ESG solutions to companies at Zeroe — so our advice works in practice, not just on paper.
Zahra MariettaCorporate ESG Expert
Bridges sustainability and software — a product manager at Zeroe and former sustainability researcher — turning ESG work into tools and systems your team will actually use.
Diva ArulitaTechnology Consultant / Product Manager
