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Environment & Sustainability Manager

Mactech Energy Group United Kingdom Added on Aug 1, 2026
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As a key leader for the Sizewell C nuclear project, you will oversee a dedicated team to ensure construction activities remain in strict alignment with environmental permits and licenses. This role involves moving beyond simple oversight to actively steering the environmental culture of a massive workforce. You will bridge the gap between complex engineering delivery and rigorous regulatory expectations, managing everything from site inspections to high-level KPI reporting.

This position is at the heart of the UK’s transition to a low-carbon economy. By ensuring the sustainable delivery of one of the nation’s largest megaprojects, you directly facilitate the generation of dependable electricity for millions of homes. Your work ensures that the road to Net Zero 2050 is built on a foundation of ecological integrity and best-in-class environmental performance at every stage of the nuclear lifecycle.

This suits someone who thrives in high-pressure, highly regulated environments and possesses the diplomatic skills to influence diverse stakeholders. You should be a seasoned professional with deep technical knowledge of large-scale infrastructure and a passion for operational excellence.

Job FAQs

What are the main missions and responsibilities of this role?

The primary mission is to provide environmental and sustainability leadership for the Sizewell C site, ensuring that all construction and associated developments strictly adhere to environmental permits, licenses, and consents. You will manage a team of ten, directing their efforts toward maintaining high-level site compliance and driving world-class environmental behavior across the supply chain. Key responsibilities include establishing compliance arrangements, monitoring site activities, and managing the ISO 14001:2015 Environmental Management System. You will also be accountable for event management, investigating environmental incidents to derive performance improvements, and developing KPIs to report on progress toward project-specific environmental objectives.

Key learning opportunities for this job

Working on a project of this scale offers unparalleled exposure to the complexities of nuclear new build and national-scale infrastructure. You will gain deep expertise in navigating the stringent regulatory requirements enforced by the Environment Agency and other public bodies, which is a highly sought-after skill in the energy sector. Furthermore, you will have the chance to refine your leadership skills by managing a multi-disciplinary team and influencing a supply chain workforce of thousands. The role provides a front-row seat to the practical implementation of Net Zero strategies within a highly regulated engineering environment, offering insights into the full lifecycle of a megaproject.

How does the ideal candidate look like (experience, skills)?

The ideal candidate is a proven leader with an environmental degree and extensive experience managing E&S teams on large-scale infrastructure or engineering projects. You should possess a broad understanding of construction field skills, ranging from civil works to mechanical and electrical completions, alongside a technical background that allows you to interface effectively with engineers. Strong interpersonal and influencing skills are essential, as you will need to guide Tier 1 suppliers and internal teams who may have competing priorities. A meticulous eye for detail, combined with the tenacity to maintain high standards in a fast-paced environment, will be key to your success in this high-stakes role.

Advice to stand out and make a successful application

To stand out, your application should demonstrate a clear track record of engaging with regulators like the Environment Agency. Highlight specific instances where you successfully managed regulatory commitments or navigated complex permitting issues on large-scale projects. Demonstrating your ability to translate high-level sustainability goals into actionable site-level procedures is critical. Focus on your leadership style and how you have previously fostered a culture of environmental excellence within a large, diverse workforce. Mentioning your experience with ISO 14001 and how you have used data-driven KPIs to improve site performance will show you have the technical and strategic maturity the project requires.

What aspects of the company's sustainability is this role likely to focus on?

The role focuses heavily on the environmental compliance and ecological impact aspect of sustainability. This includes ensuring that the construction phase of Sizewell C does not adversely affect the local environment through pollution or unauthorized activities, thereby protecting the site's biodiversity and resource integrity. Additionally, there is a strategic focus on the broader Net Zero agenda. By ensuring the successful and compliant delivery of nuclear infrastructure, the role supports the UK's long-term goal of decarbonizing the energy grid. You will be tasked with embedding sustainability into the project culture, moving it beyond a tick-box exercise to a core operational value.

What are the main challenges someone in this role might face?

One of the primary challenges is balancing the aggressive timelines of a megaproject with the uncompromising nature of environmental regulations. Managing the performance of multiple Tier 1 contractors and a workforce of 8,000 at peak requires constant vigilance and the ability to influence stakeholders who are not direct reports. Furthermore, navigating the high level of public and regulatory scrutiny associated with nuclear projects can be taxing. You will need to maintain transparency and accuracy in all reporting while ensuring that any site incidents are investigated and resolved with enough rigor to satisfy both internal and external regulators.

How could a typical day look like for someone in this position?

A typical day involves a mix of strategic planning and site-level oversight. You might start with a briefing for your direct reports to review the day's inspection schedule, followed by meetings with Tier 1 project managers to discuss compliance with specific environmental permits for upcoming work packages. You will likely spend time reviewing environmental performance data and KPIs, preparing reports for the Head of Site Compliance, and engaging with the Client Environment Team. The day could also include site walks to observe environmental behaviors first-hand or participating in regulatory interface meetings to discuss project progress and license adherence.

What are the opportunities for professional growth and development in this role?

This role places you at the senior level of one of the most significant energy projects in Europe. Success here provides a clear pathway toward higher executive roles in environmental management, site compliance, or sustainability leadership within the energy and infrastructure sectors. Given the scale and duration of the Sizewell C project, there are significant opportunities for long-term career stability and professional development. The experience gained in nuclear regulation and megaproject management is globally transferable, making you a prime candidate for future leadership roles in the global energy transition.

The main stakeholders you might be interacting with

You will interact daily with a wide array of stakeholders, including the Head of Site Compliance, to whom you are accountable, and your direct team of environmental professionals. On-site, you will work closely with Tier 1 contractors and their E&S leads to drive performance and adherence to standards. Externally, you will be a key point of contact for Environmental Regulators and other public bodies, ensuring a professional and collaborative relationship. Internally, you will engage with the Client Team and site operations to ensure that environmental objectives are integrated into every facet of the construction and commissioning process.

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