Senior Criticality Consultant; 3B Lower
Listed on 2026-07-22
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Engineering
Environmental Engineer, Research Scientist
UKNNL has a vision for Equality, Diversity and Inclusivity (ED&I) which aims to be an inclusive workplace that attracts diverse talent through transparent and equal policies and procedures. We want you and the diverse mix of people that we employ, customers that we service and stakeholders that we influence to feel valued. We encourage a workplace culture where everyone can thrive with a sense of belonging.
SeniorCriticality Consultant (3B Lower)
Category:
Nuclear Operations
Salary: £69,047 starting salary; salary range £69,017 to £74,886 (Grade 3B Lower).
Closing Date:
Location:
Preston, Lancashire
Job Description for Senior Criticality Consultant:
This is where your skills play a critical role in keeping everyone safe. Working in Safety, Security & Safeguards gives you the chance to make your mark on some hugely interesting projects. UKNNL does work that nobody else in the sector is doing, and this means we need experts like you to make it possible, whilst keeping everyone safe. We’re committed to using nuclear science to benefit society for years to come.
This means that you can build a long and successful career here whilst playing a meaningful role in delivering cleaner energy, reducing waste and keeping colleagues and the public out of harm’s way.
As the UK nuclear industry is undergoing a resurgence there is an increasing focus on the delivery of new developments, from advanced modular reactors, clean energy, nuclear medicine, new fuel types, new reprocessing processes as well as the need for support of the existing sites and processes, including decommissioning. UKNNL is at the forefront of many of these developments, particularly with its four Focus Areas, and as a result needs to maintain a position at the forefront of developments in criticality safety assessment.
The criticality team at UKNNL provides criticality safety advice and assessment for our own activities as well as for a number of customers across different licensed sites.
UKNNL are looking for a dedicated criticality specialist to take on the technical leadership of Criticality Safety Assessment within UKNNL and the development of UKNNL’s capability in this area to support our own facilities, our Focus Areas and current and future customers. This will involve liaison and collaboration with customers and other organisations as well as the development and oversight of the activities under the Core Science Theme.
You will also enhance technical skills within the Criticality area and support development of team member's skills and capability and lead activities in support of the development of UKNNL's reputation in the criticality area.
We are looking for a driven individual to lead these developments and realise the opportunities for UKNNL and its customers. The role will involve:
- Building a wide range of relationships from safety, technical and delivery teams in UKNNL, the UKNNL Focus Area leads, customers and external specialists in the field of criticality safety
- The shaping, guiding, and reviewing of the technical delivery of projects to ensure they achieve agreed objectives.
- Leading the development of any relevant technology and the capability and skills of safety assessors.
- The development and acceptance of any methodologies, processes or standards required for this evolving discipline.
- Representing UKNNL on relevant national and international forums.
- Understanding of the stakeholders within UKNNL, its customers, regulators and beyond.
You will have experience that gives examples of how you have successfully delivered to the required time, cost, and quality meeting the customer expectations. You will already have networks in place that put you on a national stage and will allow you to develop UKNNL’s reputation.
At UKNNL we support working flexibly, can accommodate homeworking, and can be flexible about location, although some travel will be necessary, to support business needs. The location for this role is flexible and can be based at Preston, Sellafield, Risley or Workington.
Main Responsibilities for Senior Criticality Consultant- Providing technical lead delivery of projects in the criticality area to time, cost, quality,…
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