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Sustainability Manager
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Location: London
Reporting to: CEO
Type: Full-time
About OMNES
OMNES is a London-based womenswear brand built around the belief that great design and a more responsible approach to fashion should go hand in hand.
As the business grows, we are looking for an experienced Sustainability Manager to lead the next stage of our sustainability strategy and ensure our ambitions are translated into credible, measurable action across product, sourcing, operations, and communications.
The Role
We are looking for an experienced and commercially-minded Sustainability Manager to take ownership of sustainability across OMNES.
This is a hands-on role working closely with our Design, Buying, Production, Marketing, and Operations teams, as well as our suppliers and external partners.
You will be responsible for developing and implementing our sustainability strategy, improving the environmental and social impact of our products and supply chain, maintaining robust standards and certifications, and ensuring that the claims we make to our customers are accurate, substantiated, and compliant.
Sustainability at OMNES should be embedded into how we make product and commercial decisions rather than treated as a separate workstream. We are looking for someone who can bring strong technical knowledge while remaining pragmatic about the realities of operating and growing a fashion business.
Key Responsibilities
Sustainability Strategy
- Own and develop OMNES’ sustainability strategy, priorities, and roadmap.
- Establish clear, measurable targets and track progress against them.
- Translate sustainability objectives into practical actions across the business.
- Identify the areas where OMNES can make the greatest measurable environmental and social impact.
- Keep the leadership team informed of progress, risks, regulatory developments, and emerging priorities.
- Ensure our sustainability strategy evolves appropriately as the business grows.
Product & Materials
- Work closely with Design, Buying, and Production to improve the environmental impact of our collections.
- Develop and maintain clear preferred-material and responsible-sourcing standards.
- Assess materials, processes, and suppliers based on environmental impact, traceability, certification, and commercial viability.
- Review and validate recycled, certified, and other sustainability-related material claims.
- Ensure appropriate documentation and certification is obtained and maintained to substantiate product claims.
- Help teams balance sustainability objectives with quality, design, margin, and scalability.
- Identify new materials, technologies, and manufacturing processes that could improve our environmental impact.
Supply Chain & Responsible Sourcing
- Work directly with suppliers to improve transparency, traceability, and environmental and social performance.
- Maintain visibility of our supplier and manufacturing base.
- Develop and manage supplier sustainability requirements, policies, and standards.
- Oversee social and environmental compliance, audits, and corrective-action processes where appropriate.
- Identify supply-chain risks and work with internal teams and suppliers to address them.
- Support improvements in areas including waste, water, energy, chemicals, packaging, and manufacturing processes.
- Work collaboratively with suppliers to drive meaningful improvements rather than sustainability becoming purely a compliance exercise.
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B Corp & Certification
- Take ownership of OMNES’ ongoing B Corp requirements and future recertification.
- Maintain the evidence, policies, and data required to support certification.
- Identify opportunities to improve OMNES’ B Corp performance.
- Manage relevant third-party certifications and sustainability standards across the business.
- Ensure certifications and supporting documentation remain current, robust, and appropriately recorded.
Sustainability Claims & Compliance
- Act as the internal point of expertise for environmental and sustainability claims.
- Review product descriptions, website copy, packaging, and marketing communications to ensure sustainability claims are accurate and appropriately evidenced.
- Work with Marketing and Ecommerce to communicate sustainability clearly without overstating claims or creating greenwashing risk.
- Keep the business informed of relevant UK and EU sustainability regulation and emerging requirements affecting fashion and textiles.
- Ensure the business is prepared for upcoming regulatory changes rather than responding to them retrospectively.
- Work with external legal or technical specialists where additional expertise is required.
Data, Reporting & Impact
- Develop a reliable framework for collecting sustainability data from suppliers and across the business.
- Measure and report against OMNES’ key sustainability KPIs.
- Support measurement of areas such as carbon emissions, materials, packaging, waste, and supply-chain impact.
- Produce regular internal reporting and contribute to external sustainability communications.
- Ensure sustainability decisions are driven by credible data rather than assumptions.
- Identify where improved data collection or systems are required as the business grows.
Internal Engagement
- Make sustainability practical and understandable for teams across OMNES.
- Work collaboratively with Design, Buying, Production, Marketing, Ecommerce, Retail, and Operations.
- Develop guidance and training so teams understand their responsibilities.
- Build sustainability considerations into existing processes rather than creating unnecessary bureaucracy.
- Be confident challenging decisions where necessary while finding commercially workable solutions.
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About You
We are looking for an experienced sustainability professional who combines deep technical knowledge with a practical and commercial understanding of the fashion industry.
You Will Ideally Have
- 6+ years’ experience in sustainability, ESG, responsible sourcing, or a related field, with a significant proportion of this experience within fashion, apparel, or consumer goods.
- Proven experience owning and delivering sustainability initiatives rather than simply supporting them.
- Strong knowledge of fashion supply chains, materials, manufacturing processes, and responsible sourcing.
- Demonstrable experience working directly with suppliers, factories, and certification bodies.
- Strong understanding of recycled and certified materials, traceability, and chain-of-custody requirements.
- Good working knowledge of UK and EU sustainability legislation, environmental claims, and greenwashing regulation.
- Experience managing or playing a significant role in B Corp certification or recertification would be highly advantageous.
- Experience developing sustainability strategies, targets, and measurable KPIs.
- Understanding of carbon accounting, environmental impact measurement, and sustainability reporting.
- Experience reviewing and substantiating sustainability and product claims.
- Strong analytical skills and confidence interrogating supplier, certification, and environmental data.
- The confidence and credibility to advise and challenge senior stakeholders when required.
- A commercial mindset and an understanding that sustainability decisions need to work alongside product, margin, quality, and growth objectives.
- The ability to operate independently, take ownership, and build processes in a growing and fast-moving business.
What Success Looks Like
Success in this role means OMNES has:
- A clear and measurable sustainability roadmap.
- Robust evidence supporting the sustainability claims we make.
- Greater visibility and traceability throughout our supply chain.
- Clear material and supplier standards embedded within product development.
- Strong systems for B Corp, certification, and regulatory compliance.
- Reliable sustainability data and reporting.
- Sustainability embedded into commercial and product decision-making across the company.
- A strategy that becomes more ambitious as OMNES grows while remaining credible, practical, and commercially realistic.
As a Certified B Corporation, we believe that business should be a force for good. We are an equal opportunity employer, celebrating diversity and committing to an inclusive environment for all employees. All employment decisions are based on business needs, job requirements, and individual qualifications, without regard to race, colour, religion, sex, sexual orientation, gender identity, national origin, veteran, or disability status.
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