Senior Sustainability Consultant

Nexio Projects is looking for a Senior Sustainability Consultant to help lead the delivery and development of our sustainability finance and reporting services. You will translate CSRD/ESRS and IFRS S1/S2 requirements into practical, audit-ready solutions for finance and sustainability leaders, build trusted relationships with senior client stakeholders, and manage engagements from scoping through delivery. This role is suited to either an experienced sustainability or ESG reporting professional with a strong technical grounding, or an audit, accounting advisory or financial reporting professional looking to apply that expertise in a hands‑on, client‑facing, service‑building capacity.

Sustainability reporting is rapidly becoming part of corporate financial reporting. CSRD and the ESRS have made sustainability disclosure a board‑level, audit‑grade exercise. The ISSB's IFRS S1 and S2 are becoming the global baseline while the market is increasingly demanding that sustainability strategy be translated into a credible financial business case connected to enterprise value creation and supporting capital allocation. Our clients, European mid‑market companies and international groups, need advisors who speak both languages: rigorous financial reporting discipline and deep sustainability expertise.

Most advisors speak one. We need both

You’ll split your time between helping shape Nexio's next generation of sustainability finance and reporting services and applying them in client engagements. Rather than joining an established practice with fixed methodologies, you’ll help define how we approach emerging topics such as ESRS audit grade reporting, IFRS Sustainability Disclosure (IFRS S1/S2), internal control framework, and financial decision‑making for sustainability.

Client engagements will provide the testing ground for new ideas. In turn, you will use lessons learned from delivery to strengthen our methodologies, tooling and commercial propositions, helping turn promising concepts into repeatable

Nexio Projects is a sustainability consultancy of 45+ people headquartered in Rotterdam, serving hundreds of European mid‑market clients across CSRD/ESRS, Eco Vadis, B Corp, CDP and net‑zero strategy. We're a certified B Corp (the highest-scoring B Corp consultancy in the Benelux), a certified Great Place To Work®, top rated consulting firm per Verdantix & consultancy.nl and a Platinum Eco Vadis strategic consulting partner.

We practice what we advise, and we hire people who combine technical seriousness with a light touch: human, humble, hardworking, and allergic to taking themselves too seriously.

You’ll join a team building and scaling Nexio's new services. The objective is to develop services that are commercially viable, repeatable and transferable across the business – not dependent on the individual who originally created them. This will include:

• Support the building and scaling of Nexio's reporting and assurance‑readiness service lines: pre‑assurance preparation, internal control and data management interoperability offerings spanning ESRS, IFRS, UK SRS, Australia AASB standards and other services which enable translating sustainability strategy into business case using financial models such as quantification of climate risk assessment, Marginal Abatement Cost Curves and Internal Carbon Pricing Develop methodologies, tooling and reusable delivery assets that make our engagements faster, more consistent and more profitable
• Build Excel‑based financial models and translate operational assumptions into financial projections
• Maintain our technical positions as the regulatory landscape moves (Omnibus, ESRS revisions, ISSB amendments, UK endorsement) and turn regulatory change into a commercial opportunity
• Contribute to proposals, thought leadership and client development alongside the leadership team.
• Capturing insights from pilot engagements and using them to continuously improve methodologies, pricing and delivery approaches.

Your client work will focus particularly…