AtkinsRéalis
Senior / Principal Engineer - Nuclear System Engineer
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Senior / Principal Nuclear System Engineer
Job Overview
Do you enjoy working in safety-critical industries and contributing to solutions for complex engineering challenges? Join us as a Senior / Principal Nuclear System Engineer and play a meaningful role in supporting our nuclear clients to assess and manage risk, ensuring the safe, reliable operation of systems that safeguard nuclear safety and generation.
In this role, you will help enable innovative decision-making across the lifecycle of nuclear facilities, bringing best practice into plant operation, maintenance, and design integrity while ensuring alignment with original purpose and reliability. Your contributions will drive UK’s ambition for low-carbon energy, shaping a more sustainable future.
The Role
- Lead and develop safety assessments for nuclear systems, including hazards analysis and safety substantiation, across design, commissioning, operation, and decommissioning of nuclear facilities.
- Partner with clients to understand strategic needs and guide technical and commercial strategies for system health, engineering substantiation, and regulatory compliance.
- Engage with stakeholders—from clients to regulators—to champion system reliability, share insights, and present technical solutions while fostering trusted, collaborative relationships.
- Work across diverse sectors, including defence, nuclear generation, new build, fusion, and SMR/AMR technologies, solving complex challenges in systems, plant, and safety engineering.
- Balance technical rigor with strategic thinking to support project delivery, blending attention to detail with a systems-level understanding.
- Collaborate globally across multidisciplinary teams at AtkinsRéalis, leveraging global expertise and contributing to a connected technical community.
- Mentor and develop junior engineers, cultivating capability and refining your own leadership skills.
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About You
We’re looking for a passionate engineer with:
- Experience in safety-critical/highly regulated environments, applying systems engineering to complex technical challenges.
- The ability to lead and optimise technical delivery, fostering collaborative problem-solving and practical, effective solutions.
- Strong communication skills to articulate complex topics clearly—adapting to regulators, clients, and cross-functional teams.
- A structured, analytical approach, balancing technical precision with broader strategic judgment.
- A culture of collaboration and knowledge-sharing, combining curiosity and flexibility while delivering high standards.
- Commitment to growth and development, valuing mentoring others, fostering inclusion, and contributing to a dynamic engineering culture.
Rewards & Benefits
Our benefits package empowers you to thrive at every stage of life and career, placing you at the centre of flexible, inclusive, and rewarding support:
- Competitive salaries and performance-based rewards tailored to your role and expertise.
- Diverse remuneration packages, including financial, health, wellbeing, and lifestyle benefits—adjustable to suit your unique needs.
- Unlimited professional development opportunities, including training and upskilling to advance your skills and career.
- Hybrid working culture, balancing professional ambition with personal flexibility.
- Emphasis on wellbeing, offering flexible working, worst-hardship and hazard pay, and tailored benefits across every life stage.
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About AtkinsRéalis
As world-class engineering services organisation, we unite expertise from many disciplines—engineering, advice, nuclear, and infrastructure—to solve some of the world’s most critical challenges. Our 24,000+ professionals across 70 countries share a mission: to engineer a better future by delivering low-carbon, sustainable energy solutions.
Collaborating with clients, partners, and technology leaders, we tackle disruptive challenges—from nuclear safety and new build projects to fusion, decommissioning, and emerging technologies. roots trace back to 1911, blending proven excellence with ground-breaking innovation.
Additional Details
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Security Clearance: This role may require access to security-designated areas and will require a UK security clearance. Offers are contingent on eligibility; interview confirmation will detail requirements. Note: Applicants need not mention prior clearance in application/conversation.
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Culture of Inclusion & Belonging: AtkinsRéalis values all backgrounds, perspectives, and characteristics, and is proud to support:
- Family-friendly policies and flexible arrangements.
- Diverse employee groups for increased representation.
- Equal Opportunities Employer: Applications are welcomed irrespective of background, culture, age, gender, orientation, religion, or ability.
- Disability Confident Leader: Applicants with disabilities meeting essential criteria are guaranteed interviews.
Staff Type: Employee, Regulatory Job Code (dependent on region): [N/A; specific roles may require onsite compliance]
Discover more: www.atkinsrealis.com | LinkedIn : /@AtkinsRéalis
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