Environment and Sustainability Lead

At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you're passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive.

Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all. We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive team who always strive to do the right thing for our people, clients and communities.

People are our greatest asset, and we offer a competitive package to retain and attract the best talent. In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships. Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.

About the opportunity
Amentum is the Design and Engineering partner for Sellafield under the PPP (Programme and Project Partners). This is a 20-year arrangement to deliver ~£7bn of major projects. We are looking to recruit high value expertise from across regulated and comparable sectors to work in a collaborative environment. PPP is delivering major projects, site wide improvements and provision of supporting services.

The Role:
The Environment and Sustainability Lead is the senior environmental and sustainability authority within PPP, responsible for integrating environmental protection, compliance, and environmental sustainability performance across all partners and projects. This role ensures that environmental requirements are embedded into engineering design, construction delivery, risk management, commercial frameworks, and site operations.

We are seeking a passionate and strategic Environment and Sustainability Lead to join us supporting our clients creating a cleaner, safer environment for future generations. You’ll be instrumental in embedding sustainable practices across a portfolio of highly complex and critical national infrastructure projects in the nuclear decommissioning industry and adjacent areas.

Working across a collaborative delivery ecosystem comprising designers, integrators, civil and process engineering experts, you will drive innovation, culture change, and ESG impact, shaping some of the UK’s most important projects.

As a Environment and Sustainability Lead you will have a:

• High level of professional knowledge and skills in sustainable engineering design, building physics, compliance modelling and operational energy assessments.

• Demonstrable experience in operational energy and life cycle carbon costing is highly desirable.

• Strong working knowledge of sustainability including best practice benchmarks, reporting, tools and techniques BREEAM, CEEQUAL, PAS2080.

• A commitment to sustainability with a strong sense of purpose and drive to make a positive difference within a sustainable business context.

• A track record of effectively collaborating, innovating and driving sustainable outcomes through project design processes

This exciting role will incorporate, leadership and support relating to project development and general environmental management work, assisting projects to meet legal and company requirements and to drive improved environmental performance. Promoting best environmental and a commitment to sustainability with a strong sense of purpose and drive to make a positive difference within a sustainable business context practice and improved business management of environmentally related issues.

What you will need as an Environment and Sustainability Lead:

• Degree or equivalent knowledge & experience in Sustainability, Environmental Management, Engineering, or related field.

• Proven experience leading sustainability on major construction or infrastructure projects.

• Strong understanding of UK sustainability legislation, standards ( PAS2080, ISO 14001), and carbon/net zero frameworks.

• Skilled in managing stakeholder engagement and translating complex data into clear, compelling narratives.

• Collaborative and pragmatic approach, seeing the bigger picture, whilst mindful of the stringent regulatory environment we and clients routinely operate in.

• Membership of IEMA, CIOB, ICE, or similar recognised body; working towards or holding Chartership is preferred.

• Experience with or good working knowledge of BREEAM, LEED, WELL, or similar certifications.

• Good knowledge of PAS2080 and experience in its implementation

• Familiarity with Science-Based Targets, carbon accounting platforms, or social value measurement frameworks.

Our Culture

Our values are built on a strong foundation of safety, integrity, and respect for every individual. People are at the heart of our mission, and we believe in supporting one another through a culture of care and collaboration. We strive to create a workplace where everyone feels they belong and can thrive. Supporting mental wellbeing and fostering a sense of connection are essential to how we work.

When we embrace different perspectives and work together, we become more innovative, more agile, and more successful.

We partner with , for greater online accessibility please visit to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy.

We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.

If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team.