Environmental & Sustainability Manager

ISEP; Leiston; Hybrid; GBP 85,000 - 110,000; Full time

Benefits offered by this job

Free medical cover

Parental leave pay

Professional development reimbursement

Job summary

Amentum is seeking an Environmental & Sustainability (E&S) Manager to lead the site-based E&S team for the Sizewell C nuclear project in Suffolk. You will ensure compliance with permits and licences, manage regulatory commitments, and drive sustainability across SZC and its supply chain.

You will guide a multidisciplinary team, liaise with regulators and Tier 1 contractors, and implement KPIs to improve environmental performance across pre-construction, construction, and commissioning phases.

Qualifications

• Extensive experience leading E&S teams on major, highly regulated construction projects.
• Strong understanding of environmental permits, licences, and compliance arrangements.
• Broad construction knowledge (civils mechanical electrical commissioning).
• Strong leadership, influencing, communication, and stakeholder management skills.
• Ability to work across technical disciplines and operate effectively from site to boardroom.
• High standards of organisation, detail, assurance, and professional judgement.
• Understanding of sustainability opportunities and constraints on major projects.

Responsibilities

• Provide clear leadership to E&S teams and Tier 1 contractors.
• Ensure full compliance with environmental permits, licences, consents, and ISO 14001.
• Oversee site inspections, surveillance, and performance monitoring.
• Ensure significant environmental aspects are identified, managed, and mitigated.
• Drive environmental and sustainability performance across SZC and supply chain.
• Promote world-class environmental behaviours and best practice.
• Lead environmental investigations and implement performance improvements.
• Act as primary interface with environmental regulators (e.g., Environment Agency).
• Build strong working relationships with internal teams, contractors, and public bodies.
• Provide a professional service on all environmental and regulatory matters.
• Develop and implement KPIs and reporting to drive continuous improvement.
• Ensure department processes, resourcing, and quality standards meet SZC requirements.
• Support delivery teams across pre-construction, construction, and commissioning phases.
• Embed lessons learned and support the One Team culture with Tier 1 contractors.

Job description

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 and diverse 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:

• 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
• 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:

Provide leadership in environmental and sustainability performance for Sizewell C (SZC), ensuring full compliance with environmental permits, licences, and commitments across a nationally significant nuclear construction project. Lead the site-based Environment & Sustainability team and act as the main interface with regulators, contractors, and SZC project leaders.

Sizewell C is constructing a major nuclear power station in Suffolk. The role supports compliance through construction, installation, commissioning, and handover to operations. The E&S Manager sits in the Site Construction Delivery Team, reporting to the Head of Site Compliance. The project operates under strict environmental frameworks (DCO, permits, licences) and is subject to high public and regulatory scrutiny.

The role oversees a multidisciplinary E&S team (10 people), influences Tier 1 contractors, and manages environmental monitoring budgets.

Key Responsibilities

• Provide clear leadership to E&S teams and Tier 1 contractors.
• Ensure full compliance with environmental permits, licences, consents, and ISO 14001.
• Oversee site inspections, surveillance, and performance monitoring.
• Ensure significant environmental aspects are identified, managed, and mitigated.
• Drive environmental and sustainability performance across SZC and supply chain.
• Promote world-class environmental behaviours and best practice.
• Lead environmental investigations and implement performance improvements.
• Act as primary interface with environmental regulators (e.g., Environment Agency).
• Build strong working relationships with internal teams, contractors, and public bodies.
• Provide a professional service on all environmental and regulatory matters.
• Develop and implement KPIs and reporting to drive continuous improvement.
• Ensure department processes, resourcing, and quality standards meet SZC requirements.
• Support delivery teams across pre-construction, construction, and commissioning phases.
• Embed lessons learned and support the One Team culture with Tier 1 contractors.

Here's What You'll Need:

• Extensive experience leading E&S teams on major, highly regulated construction projects.
• Strong understanding of environmental permits, licences, and compliance arrangements.
• Broad construction knowledge (civils mechanical electrical commissioning).
• Strong leadership, influencing, communication, and stakeholder management skills.
• Ability to work across technical disciplines and operate effectively from site to boardroom.
• High standards of organisation, detail, assurance, and professional judgement.
• Understanding of sustainability opportunities and constraints on major projects.
• Degree in Environmental discipline.
• Strong leadership experience.
• Extensive client & principal contractor experience managing environmental issues on large infrastructure or engineering projects.
• Experience working with regulators and managing regulatory commitments.
• Experience implementing management systems and environmental controls.

Our Culture

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business, and we genuinely believe that we all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees.

We aim to embed inclusion in everything we do. We know that if we are inclusive, we're more connected, and we're more creative. We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you're pregnant or on family leave. This is reflected in our wide range of Global Employee Networks.

We partner with VERCIDA to help us attract and retain diverse talent. 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