Criticality Safety Assessor


Our client is an international technical and engineering services partner involved with various nuclear & defence projects within the UK. We are now recruiting for a Criticality Safety Assessor to support their major projects.

Purpose and Scope:

As the Criticality Safety Assessor you will be part of a major programme safety case team, providing nuclear criticality modelling and safety assessment.

Benefits & Salary & Location:

  • Salary: Attractive & Competitive salary (open to negotiation)
  • Benefits: Additional benefits including Private Medical & Life Assurance
  • Hybrid Working (3 Days onsite)
  • Location: Reading or Warrington (may look further afield for the right candidate)


  • Undertaking criticality assessment, and associated activities, interfacing with engineering, project management, project controls and document management functions.
  • Act in any criticality or equivalent role.
  • Support the Safety Case Manager.
  • Support wider EUP safety case and engineering leads when requested.
  • Assist the Head of Profession in capability development and establishment and implementation of resource strategies, recruitment plans and competence.
  • Advise the company and Client leadership, engineering, programme and project management, and clients (intelligent Customer), on regulatory compliance, standards and guidance.
  • Interfaces as necessary with suppliers.
  • Supports the client in interactions with Regulators and safety committees.

Education & Experience:

  • Ideally a Bachelor of Science degree (or equivalent education);
  • UK and International standards and practices (examples include American Nuclear Society and ONR Technical Assessment Guides)
  • Nuclear criticality safety assessment and HAZAN production;
  • Experience of relevant code (MONK, MCNP etc.) application in a wide range of operations and fault scenarios.
  • Knowledge of a range of nuclear hazard identification and analytical tools;
  • Ability to travel for several days at a time in the UK and occasional overseas travel.

Advantageous Experience (desirable not essential):

  • Knowledge of UK nuclear site licensing, safety assessment principles, regulatory guidance on safety assessment and nuclear Site Licence Conditions.
  • Experience in two or more UK Nuclear Site Licensee Organisations.
  • Knowledge of Regulatory permissioning/flexible permissioning.
  • Experience of safety case in civil reactors and defence sector.
  • Experience of international nuclear safety assessment.

Position will require ability to gain and retain Security Clearance and willingness to obtain Developed Vetting.

Please note we unfortunately won’t be able to respond to every applicant due to high volumes.