Make a real impact on the future of clean, secure energy. We’re looking for an experienced Nuclear Criticality Safety Consultant to join our large & growing team of experienced nuclear safety case professionals and help deliver high‑quality safety advice across some of the most complex, high‑profile clients (including EDF Energy (HPC, SZC and Generation), Urenco, Babcock Marine at Devonport, Canadian Nuclear Laboratory, Sellafield Ltd, Nuclear Restoration Services, Nuclear Waste Services to name a few!) and projects in the nuclear sector. If you’re motivated by meaningful work, technical challenge, and the opportunity to shape safer nuclear operations, we’d love to hear from you. Stantec’s nuclear capability work with operators and regulators across the new build, existing generation, decommissioning and defence markets. We specialise in safety cases, criticality assessment, environmental management, nuclear safety governance, radioactive waste management and decommissioning strategy, and development/demonstration of nuclear organisational capability. ABOUT THE ROLE You’ll play a key role in supporting clients across the full nuclear lifecycle - operations, life extension, and decommissioning. Your work will include: Conducting comprehensive nuclear criticality safety assessments for various nuclear systems, facilities, and operations. Supporting our clients to develop and implement criticality safety programs, policies, and procedures in accordance with industry standards and regulatory requirements. Performing complex calculations and analyses using specialized nuclear criticality codes and software tools. Evaluation and mitigation of potential risks associated with nuclear criticality events through effective safety controls and measures. Providing technical expertise and guidance to multidisciplinary teams on criticality safety issues and solutions. Producing, reviewing and approving criticality safety documentation, reports, and procedures. Collaborating with clients, regulatory authorities, stakeholders, and external consultants on criticality safety matters. Taking a lead role on delivery of specific technical work tasks, documentation review/update, technical report authoring, technical recording at workshops Supporting in client engagement and business development interactions, as well as support to the development of bid submissions for new work YOUR IMPACT As an experienced Criticality Safety Consultant, you will help ensure nuclear operations remain safe, stable, and fully compliant across the entire lifecycle of facilities and programmes. Your expertise will give clients confidence that criticality risks are understood, controlled, and managed in a way that protects people, the environment, and the communities we serve. In this role, you will strengthen the safety and defensibility of nuclear operations by delivering rigorous criticality assessments that underpin safe facility design and operation. Reduce the likelihood of criticality events by helping clients establish robust control strategies grounded in high‑quality analysis and modern industry practice. Improve project certainty by clarifying criticality risks early, enabling better‑informed engineering decisions and more efficient project progress. Support constructive regulatory engagement by ensuring clients present clear, evidence‑led criticality arguments aligned with UK and international expectations. Enhance organisational resilience by raising the quality, structure, and clarity of criticality safety documentation and governance. Overall you will play a key role in contributing to the safe delivery of clean energy and decommissioning programmes, helping ensure nuclear activities remain responsible, sustainable, and trusted. ABOUT YOU To be successful in this role you will have: Experience in nuclear criticality assessment and safety within the nuclear industry. Strong understanding of regulatory requirements and standards related to nuclear criticality safety (e.g., ONR, IAEA). Bachelor’s degree in Nuclear Engineering, Physics, or a related field. Advanced degree (Masters or PhD) preferred. In-depth knowledge of nuclear criticality codes (e.g., MONK, MCNP, SCALE) and proficiency in performing criticality calculations. Excellent analytical and problem-solving skills, with the ability to assess complex technical issues and develop effective solutions. Effective communication skills, with the ability to convey technical information clearly and concisely to both technical and non-technical stakeholders. Technical leadership experience in managing criticality safety projects and guiding junior staff members. WHY JOIN US We put people first: We're proud of our friendly, inclusive and collaborative environment where everyone feels valued and driven to succeed. We are driven to achieve : Named in the top 50 companies to work by Glassdoor 2025. Recognised by Corporate Knights as one of the world's top 10 most sustainable companies 2025. We do what is right: Industry leading training and development as well as paid for professional subscriptions. We are better together : A supportive and collaborative team environment and Early Careers peer group and wider ERG network (see more on our ERGs here: Stantec Employee Resource Groups) Growth: We're on an exciting growth journey across the UK - we want you to be part of it! Great Benefits: Competitive salary, bonus schemes, enhanced pension plan, annual leave with the option to buy/sell additional days, private medical insurance, group income protection & life assurance included as standard as well as discounted gym membership and lots more. Hybrid / Flexible working : Enjoy a healthy work-life balance with our hybrid approach to flexible working. Ready to make your mark? If you’re looking for a role where your expertise directly contributes to a safer, more sustainable energy future, we’d love to meet you. Apply today and help shape the next generation of nuclear safety. About Stantec The Stantec community unites more than 34,000 employees working in over 450 locations across 6 continents. We have been working with our clients and communities in the UK for over 150 years. We plan, design, deliver and manage the development and infrastructure needed to support the creation of sustainable, healthy and prosperous communities. Our teams provide effective and relevant solutions, translating our clients’ vision into valued consents, deliverable plans for projects and programmes, and efficient designs for delivery, based on technical excellence and deep market insights. We deal with today’s challenges, but also keep a fairer, better tomorrow in sight, looking at how we deliver clean growth, support radical changes in our economy and meet the needs of future communities. Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment. Building an inspired, inclusive work environment that attracts, supports, and develops world-class talent is a crucial key to our success. If you are excited by this role but worry that your experience doesn’t exactly align, we encourage you to apply. At Stantec we want you to perform your best at every stage of the recruitment process and are committed to ensuring it is accessible to all. If you need any support or require adjustments to be made, then please contact [email protected] and we will talk to you about how we can support you.