Senior Principal Consultant - Environmental Permitting​/Waste​/Decomm; Nuclear

The Opportunity

Stantec’s Nuclear team is entering an exciting phase of growth. Having secured positions on several significant multi-year frameworks, we are expanding our capability to support some of the most complex and impactful projects across the nuclear sector.

We are looking for a Principal or Senior Principal Consultant in Environmental and Radioactive Waste Management to join our growing team. This role offers opportunities to be based in Warrington, Manchester, Glasgow, Bristol, Northampton, or Cambridge, and to work with a wide range of clients including Gigawatt-scale and Small Modular Reactor developers, nuclear site licensees, waste management organisations, regulators, and the defence sector.

This is a unique opportunity to influence the future of the nuclear industry, supporting projects across the entire nuclear lifecycle—from new build and operational facilities through to decommissioning and the safe management of radioactive waste.

As a Principal or Senior Principal Consultant, you will play a senior leadership role within the Nuclear team, providing specialist environmental and radioactive waste consultancy services to clients across the UK and internationally.

You will lead the delivery of technically complex projects, supporting nuclear new build and decommissioning programmes through the development of waste strategies, environmental safety cases, permitting strategies, and regulatory compliance programmes. Your expertise will help clients navigate environmental and radioactive waste management challenges while ensuring compliance with evolving regulatory requirements.

Alongside technical delivery you will drive continued growth of the business through business development activities, from identifying opportunities and developing client relationships to leading bids and preparing technical proposals. You will also mentor colleagues, build team capability, and support the growth of a high‑performing consultancy team.

As a senior member of the business, you will contribute to continuous improvement initiatives, helping to shape internal processes, standards, and procedures to ensure we continue to deliver excellence across our projects and services.

In this role you will directly influence the safe, sustainable, and effective management of radioactive materials and environmental challenges across some of the UK’s most important nuclear programmes. Your advice and technical leadership will support clients in making informed decisions that balance operational, environmental, regulatory, and commercial considerations.

Through the development of waste management strategies, environmental submissions, safety cases, and regulatory engagement plans, you will help organisations successfully navigate complex challenges throughout the nuclear lifecycle.

Beyond project delivery you will shape the future of our Nuclear business—strengthening our market position, expanding our client base, and supporting the next generation of nuclear consultants.

You are an experienced environmental or radioactive waste professional with a strong track record of delivering consultancy services within the nuclear sector or other high‑hazard industries. You enjoy solving complex technical challenges, building strong client relationships, and contributing to both business growth and team development.

• Significant experience supporting environmental, radioactive waste management, or decommissioning activities within the nuclear sector
• A relevant science, engineering, or environmental degree, with postgraduate qualifications desirable
• Direct experience providing environmental and waste consultancy services to nuclear licensed sites
• Strong understanding of environmental permitting, radioactive waste management, environmental safety cases, and regulatory compliance requirements
• Experience engaging with regulators, stakeholders, and clients across complex projects
• Proven business development experience, including opportunity identification, bid leadership, tender preparation, and client management
• Strong project management skills, including project planning, cost control,…