RSB – Roundtable on Sustainable Biomaterials is a global, multi-stakeholder organisation dedicated to driving the truly sustainable development of the bioeconomy. Frequently recognised as an industry leader in supply chain sustainability, RSB applies its best-in-class sustainability framework across sectors including aviation, chemicals, materials, and shipping.
Our small, dedicated team operates remotely from countries around the world, working collaboratively with a diverse base of member organisations, industry partners, and policymakers. For more information, please visit www.rsb.org.

Purpose of This Call
RSB now invites eligible firms and individuals (“Consultants”) to indicate their interest in providing the Services described below. This Call for Expressions of Interest is not yet linked to a specific project or immediate assignment. RSB is building a pre-approved External Consultant Roster: a qualified pool of selected specialists and organisations that will be called upon for project-based work for the next 2-3 years.
We are primarily seeking to engage consultancy firms, agencies, and other established organisations, providers that can offer dedicated capacity, depth of expertise, and continuity across assignments. At the same time, we warmly welcome expressions of interest from independent consultants and other individual specialists whose qualifications and experience match the profiles sought. Throughout this document, “Consultant” refers to both firms and individuals unless stated otherwise.
Consultants accepted onto the roster will complete a brief onboarding process to become familiar with RSB’s systems, ways of working, and sustainability framework, so that engagements can begin efficiently when a relevant need is identified. When a specific project or capacity gap emerges, RSB will contact roster members whose profile best matches the assignment, share a defined scope of work, and invite them to submit a proposal.
Inclusion on the roster is an expression of readiness and fit and not a guarantee of immediate work or remuneration.

The Services
The Sustainable Bio-Materials & Regulatory Compliance Consultant will provide regulatory compliance and sustainability assessment expertise for bio-based materials, sustainable fuels, feedstocks and related value chains. Consultants in this profile support RSB Advisory Services with the expert practical interpretation of regulatory frameworks, such as EU RED, CORSIA and relevant voluntary certification requirements, including their GHG calculation methodologies. They support feedstock eligibility, low-ILUC considerations, sustainability-risk screening, voluntary scheme benchmarking and compliance gap identification.
Role purpose: To provide RSB with flexible, project-based technical capacity for assessing whether bio-based materials, fuels, feedstocks and supply chains meet applicable regulatory and voluntary sustainability requirements. The role helps RSB and its clients translate complex rules into defensible assessments, calculations and compliance pathways, particularly where GHG data quality, feedstock eligibility, certification readiness or regulatory interpretation are central to the assignment.
Full or partial coverage: Applicants are eligible whether they wish to cover the full scope or only a clearly defined subset of the technical areas and task requirements described below (partial coverage), based on their knowledge, skills and capabilities. Partial coverage applicants are encouraged to submit their candidacy as well.
Confidentiality: Due to non-disclosure and confidentiality commitments within RSB Advisory Services, specific project-related work cannot be attached to or disclosed in this call.

Key Responsibilities
•    Contribute to narrowing and confirming the scope, system boundaries and methodological approach for assessments under EU RED, CORSIA, RSB or other relevant regulatory and voluntary sustainability frameworks.
•    Review third-party-supplied GHG inventory data, apply consistency and plausibility checks, validate assumptions, clean data, identify missing or unreliable data, and propose defensible proxies or literature-based values where appropriate.
•    Support or perform GHG calculations and carbon-intensity assessments using relevant or pre-defined methodologies and tools, including the RSB GHG Calculator where applicable.
•    Prepare clear GHG, LCA or sustainability assessment reports using agreed templates, including methodology, assumptions, data-quality notes, result presentation and interpretation.
•    Provide support for the technical understanding of sustainable bio-material pathways and low-ILUC risk considerations under EU RED, CORSIA, RSB or equivalent requirements.
•    Support regulatory and voluntary-scheme gap analyses by participating in the documentation of benchmarking requirements, identifying, verifying or validating compliance risks, and reviewing third-party organisational documentation against criteria (met, not met or not applicable).
•    Review certification-readiness documentation under RSB guidance, including evidence related to feedstock origin, traceability, chain of custody, sustainability criteria and GHG claims.
•    Support the interpretation of policy or regulatory requirements for specific feedstocks, technologies, products or markets by providing supporting data and literature reviews, and translate findings into practical compliance options in line with the applicable standard requirements.
•    Support the development or refinement of methodologies, blueprints and decision tools for innovative sustainability assessments involving bio-based materials, fuels, chemicals or emerging feedstock pathways.
Requirements
Essential (all applicants, firms and individuals, must meet these criteria):
•    Strong written and spoken English proficiency.
•    Ability to maintain regular availability overlapping with CET working hours of a minimum of 4 hours per day.
•    Prove