Assystem is an independent international engineering and project management company with a strong track record delivering complex, regulated infrastructure projects across the energy, infrastructure and defence sectors. With over 55 years’ experience, Assystem supports clients throughout the full project lifecycle, from strategy and design through to construction, commissioning and operation.

Within Assystem, the Environment, Consents & Engagement (ECE) Practice provides specialist environmental, sustainability and stakeholder expertise to major projects across the UK. The team supports clients in securing and maintaining environmental consents, managing environmental risk and ensuring compliance during construction, while also helping to integrate sustainability requirements into project delivery in a practical and proportionate way.

Assystem is currently supporting the delivery of the Sizewell C Nuclear Power Station, one of the UK’s most significant low-carbon infrastructure projects.

We are seeking an experienced Site Environmental & Sustainability Manager to provide senior environmental and sustainability leadership across the Sizewell C construction site and associated developments.

Reporting to the Head of Site Compliance, you will be accountable for ensuring full compliance with environmental permits, licences and regulatory commitments, while driving high standards of environmental behaviour and sustainability performance across site teams and the supply chain.

This is a highly visible, site-based leadership role operating across pre-construction, construction delivery and commissioning phases on a large, complex and highly regulated project.

Key Responsibilities

• Provide clear, authoritative environmental and sustainability leadership to site teams and Tier 1 contractors, setting standards and expectations for performance
• Establish, maintain and oversee robust arrangements to ensure compliance with environmental permits, licences, consents and project commitments
• Lead and coordinate environmental and sustainability activities across the site to ensure compliance with agreed standards, regulatory requirements and best practice
• Drive a strong environmental and sustainability culture, promoting world-class behaviours across the delivery teams and supply chain
• Ensure significant environmental aspects and risks are identified, managed and mitigated appropriately throughout construction and commissioning
• Work closely with project and operations teams to drive continuous improvement in environmental and sustainability performance
• Lead engagement with environmental regulators, in particular the Environment Agency, working collaboratively with the Client Environment Team
• Maintain compliance with the ISO 14001:2015 Environmental Management System, ensuring effective implementation against policy, objectives and targets
• Maintain oversight of site environmental inspections, audits and surveillance programmes
• Develop and implement environmental and sustainability performance measures (KPIs), including reporting and review processes
• Lead environmental incident and event investigations, ensuring learning and improvement actions are implemented
• Manage departmental resources, processes and budgets, ensuring activities are optimised to meet project objectives
• Lead, develop and performance-manage environmental and sustainability staff, ensuring capability aligns with project needs
• Build and maintain effective working relationships with internal and external stakeholders, including client teams, internal regulators, Tier 1 contractors and statutory bodies

Sustainability Leadership

As part of the wider environmental remit, you will provide leadership on sustainability delivery across the site, including:

• Carbon reduction, including implementation of PAS 2080–aligned initiatives
• Sustainable water consumption and resource efficiency
• Circular economy principles, including waste reduction and material reuse
• Supply chain biodiversity and nature enhancement measures
• BREEAM Infrastructure, supporting achievement of a Whole Project Award – ‘Very Good’

You will be a senior environmental leader with extensive experience operating in large, complex and highly regulated construction or infrastructure environments, with a strong understanding of how environmental and sustainability requirements are delivered across the construction lifecycle.

Essential:

• Degree qualified in an environmental or related discipline
• Extensive experience providing senior environmental and sustainability leadership on major construction or infrastructure projects
• Broad construction field experience, ideally across multiple phases of the project lifecycle, including site preparation, civils, mechanical and electrical installation, with exposure to commissioning activities
• Strong understanding of the practical challenges of delivering environmental compliance and sustainability through complex engineering works, ensuring activities are manufactured as specified and built as designed
• Detailed knowledge of environmental permits, licences, consents and regulatory compliance within highly regulated environments
• Proven ability to lead, influence and challenge senior stakeholders, delivery teams and Tier 1 contractors
• Experience implementing and maintaining ISO 14001 Environmental Management Systems
• Strong stakeholder management skills, including direct engagement with environmental regulators
• Demonstrated leadership experience, including direct line management and/or functional leadership of site and supply-chain teams
• Excellent written and verbal communication skills, with credibility to operate in a high-profile, multi-stakeholder environment

Desirable:

• Experience in a highly regulated industry (e.g. nuclear, energy, major infrastructure)
• Experience driving environmental and sustainability performance on large-scale projects
• Chartered status or membership of a relevant professional body (e.g. IEMA, CIEEM)

Why Join?

• A senior leadership role on a nationally significant infrastructure project
• Real accountability and influence over environmental and sustainability performance at scale
• Opportunity to lead teams and shape environmental culture across a complex construction programme
• Exposure to one of the UK’s most challenging and high-profile delivery environments

Benefits include:

• Pension scheme (8% company contribution / 4% personal contribution)
• 25 days’ paid annual leave + bank holidays + option to buy or sell days
• Professional fees reimbursed
• Flexible working
• Employee referral scheme

We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future.