Senior Nuclear Criticality Assessor

We have a fantastic opportunity for an experienced Senior Nuclear Criticality Assessment Specialist to join our thriving Nuclear team in our Warrington office.

The Team – Our Nuclear Division

Our Nuclear Division is well established but still very much a growing team, supporting a wide range of key nuclear projects across the UK, from new build through to decommissioning. We pride ourselves on being innovative and providing strategic and bespoke support to meet our clients’ needs, and have worked hard to build strong and mutually beneficial relationships with these clients. We recognise that the success of our business is underpinned and sustained by our people, and we always seek to ensure that we support, encourage and empower each member of our team to further build on what we have achieved.

We have a number of exciting projects, ongoing as well as future opportunities, with a wide range of high-profile nuclear clients. This includes delivery of work through large, long-term frameworks as well as through smaller, bespoke work packages. We are keen to welcome the right person into our team to support the successful delivery of this work and continued growth. 

The Role – Senior Nuclear Criticality Specialist

We are seeking a highly skilled and experienced Senior Nuclear Criticality Assessment Specialist to join our team. As a key member of our team, you will play a crucial role in supporting our clients to develop designs that will ensure the safe operation of nuclear facilities and the compliance with regulatory standards.

Key Responsibilities:

• Conduct comprehensive nuclear criticality safety assessments for various nuclear systems, facilities, and operations.
• Support our clients to develop and implement criticality safety programs, policies, and procedures in accordance with industry standards and regulatory requirements.
• Perform complex calculations and analyses using specialized nuclear criticality codes and software tools.
• Evaluate and mitigate potential risks associated with nuclear criticality events through effective safety controls and measures.
• Provide technical expertise and guidance to multidisciplinary teams on criticality safety issues and solutions.
• Produce, review and approve criticality safety documentation, reports, and procedures.
• Collaborate with clients, regulatory authorities, stakeholders, and external consultants on criticality safety matters.

Requirements:

• Bachelor’s degree in Nuclear Engineering, Physics, or a related field. Advanced degree (Masters or PhD) preferred.
• Proven experience (at least 7-10 years) in nuclear criticality assessment and safety within the nuclear industry.
• In-depth knowledge of nuclear criticality codes (e.g., MCNP, SCALE) and proficiency in performing criticality calculations.
• Strong understanding of regulatory requirements and standards related to nuclear criticality safety (e.g., ONR, IAEA).
• 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.
• Leadership experience in managing criticality safety projects and guiding junior staff members.

What's great about the Stantec Group 

As a global design leader with over 30,000 engineers, architects, scientists, and project managers, the Stantec Group is dedicated to designing with communities in mind. Our diverse expertise allows us to tackle projects of all sizes from complex urban developments to impactful neighborhood initiatives, while connecting across our worldwide network to support one another and share knowledge. This commitment not only helps the communities we serve to thrive but enriches the growth and experience of our own people.

In the UK and Ireland, our growing team of 4,000 is both agile and influential, able to make a meaningful difference by creating solutions that respect the environment and enhance community value. Whether you’re just starting your career or are an experienced professional, your voice is valued here. Our collaborative culture encourages entrepreneurial thinking, ensuring everyone’s ideas are heard.

Our approach for clients is grounded in the belief that we’re stronger together. By merging Hydrock’s capabilities with Stantec’s multidisciplinary services in buildings, infrastructure, environmental science, energy, and sustainability, we’re uniquely positioned as a major force in the UK market, providing a powerful platform for future growth.

What We Offer:

• Inspiring and supportive colleagues
• Recognition for hard work and career progression
• Opportunities to develop both technical and soft skills
• Competitive starting salary
• Community involvement through “Stantec in the Community” initiatives
• Flexible benefits, including a green car leasing scheme

A Culture of Inclusion and Opportunity

The Stantec Group champions diversity, equity, and inclusion. As an Equal Opportunity Employer, we’re committed to creating a supportive environment where every employee can perform at their best. Flexibility is essential to our culture, and we aim to accommodate all employees fairly.

We consider all application individually with the required qualifications and knowledge without regard to any of the protected characteristics. We would like to provide everyone with a fair selection, assessment and employment experience so we ask with are made aware of any physical or neurodiverse condition within your application for which appropriate reasonable adjustments can be made by us. 

Ready to Take the Next Step?

Once you’ve applied through our careers site, we strive to respond promptly after reviewing your application.

If shortlisted, you’ll first connect with our Talent Acquisition Team for a pre-screening call (about 30 minutes) to discuss your motivation and interest in the role. From there, successful candidates will be invited to a formal interview, either via Microsoft Teams or in person at one of our offices.

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