About Rimba
Rimba is building AI-powered software for industrial operations and sustainability compliance.
Renewable fuel and industrial companies still manage critical certification workflows across spreadsheets, PDFs, disconnected systems, and manual reporting. Rimba connects operational and business data and turns it into reliable, audit-ready workflows.
We're backed by Y Combinator and other leading investors and work with companies across energy and industrial sectors.
We're looking for an experienced sustainability certification professional with hands-on consulting or auditing experience to help customers implement certification correctly and help us build the software that makes compliance easier to operate at scale.
The Role
You'll lead sustainability certification and advisory work at Rimba, working directly with customers, founders, product and engineering teams, auditors, and certification bodies.
You'll guide customers from certification scope and registration through implementation, audit readiness, certification, and ongoing reporting. You'll also turn your expertise into repeatable workflows that can be embedded in Rimba's product.
This is a hands-on role for someone who wants to stay close to real certification work while helping define how modern sustainability compliance software should operate.
What You’ll Work On
Lead end-to-end ISCC and other certification projects, from scope and registration through audit preparation, certification, and ongoing compliance
Advise customers on ISCC EU, ISCC PLUS, ISCC CORSIA, and EU RED III requirements
Design and review mass-balance, chain-of-custody, sustainability declaration, supplier documentation, traceability, and record keeping processes
Guide Union Database (UDB) setup and operations, including registration, transaction reporting, traceability, and reconciliation
Perform and review GHG calculations under EU RED III, ISCC, and related methodologies
Conduct certification-readiness assessments and identify gaps before initial, surveillance, and recertification audits
Work with product and engineering to translate certification requirements into software workflows, controls, calculations, and automated evidence collection
What we’re looking for
You probably have 3+ years of hands-on experience in sustainability certification, auditing, renewable fuels, bioenergy, or a closely related field. We care more about what you've actually implemented, reviewed, or audited than the number of years on your resume.
We're looking for someone with practical experience across several of the following:
ISCC EU, with working knowledge of ISCC PLUS and/or ISCC CORSIA
EU RED II / RED III requirements
ISCC mass-balance and chain-of-custody systems
GHG emissions calculations under EU / ISCC methodologies
Union Database (UDB) workflows
Preparing companies for certification and surveillance / recertification audits
Reviewing sustainability declarations, supplier evidence, mass-balance records, GHG calculations, and supporting documentation
Completed ISCC auditor training or qualification is strongly preferred, particularly for ISCC EU. Experience as an RSB auditor or lead auditor is an additional advantage.
Experience at a certification body, sustainability consultancy, verification body, or renewable-fuels company is especially relevant.
Additional Experience We Value
Experience with RSB, biofuels, biogas / RNG, SAF, biomethane, hydrogen / e-fuels, or other low-carbon fuels is valuable. Familiarity with the Italian National Certification Scheme, Nabisy, Guarantees of Origin (GO), ReFuelEU Aviation, FuelEU Maritime, European renewable-fuel trading, or national registries is a plus.
You Might be a Great Fit If
You take ownership. You can take an ambiguous certification problem, determine what is required, and drive it through implementation.
You know the standards in practice. You understand not just what the guidance says, but how auditors, certification bodies, and economic operators apply it.
You are proactive. You identify gaps early, anticipate audit issues, and create a clear path forward without waiting for a checklist.
You can translate expertise into systems. You enjoy turning complex requirements into repeatable processes, controls, calculations, and software workflows.
You want to build. You are excited to shape a product and a category, not just deliver another audit or consulting engagement.
Why Rimba
Experienced auditors and consultants see the same problems repeatedly: missing sustainability declarations, broken mass balances, inconsistent GHG calculations, UDB reconciliation issues, and teams scrambling for evidence before an audit.
At Rimba, you'll help solve those problems upstream. Instead of only identifying compliance gaps, you'll help design the systems that prevent them and encode your expertise into software that can be used across many facilities and supply chains.
You'll work directly with customers and engineers, stay close to real certification work, and have meaningful influence over how Rimba's sustainability product is built.
The role is approximately 40% subject-matter leadership and product, 40% strategic customer advisory and implementation, and 20% certification and regulatory research.
How to Apply
Email your resume to careers@rimba.ai with the subject:
Senior Sustainability Certification Manager
In your email, tell us briefly:
What excites you about Rimba and this role
Your experience with ISCC, RSB, RED III, UDB, and/or GHG calculations
A certification, audit, or implementation problem you personally owned and how you
approached it
Former ISCC / RSB auditors and certification consultants are especially encouraged to apply. We are looking for someone with high agency, strong judgment, and the drive to help define how modern sustainability certification should operate