Principal Radiation Physicist

Principal Radiation Physicist

Location: Hybrid (regular onsite presence required)
Salary: Competitive

Seeking a Principal Radiation Physicist to lead and support advanced radiation physics, shielding analysis, and radiological safety activities within a highly regulated, safety-critical engineering environment.
This role combines technical leadership, system qualification, shielding design, radiation transport analysis, and safety justification, supporting complex engineering programmes while contributing to tool development and design optimisation.

• Lead and conduct radiological assessments and experimental studies to support system qualification and verification.
• Produce and review radiological safety justifications for proposed design solutions and engineering modifications.
• Support and guide design optimisation activities, balancing build constraints with performance and safety requirements.
• Lead or contribute to detailed radiation shielding design and validation.
• Perform and oversee radiation transport modelling and analysis using point kernel and Monte Carlo methods.
• Use and support development of radiation transport tools such as MCNP, MCBEND, ATTILA, or equivalent.
• Direct development of in-house analytical toolsets and methodologies to support departmental capability and project delivery.
• Support radiation metrology, safety studies, and technical substantiation activities.
• Provide technical leadership and guidance on radiological risks, engineering decisions, and compliance with ALARP principles.
• Produce and review high-quality technical reports, calculations, and supporting safety documentation.

• Degree qualified in Physics, Mathematics, Chemistry, Nuclear Engineering, or a related STEM discipline.
• Strong experience in:
  • Radiation Physics
  • Radiation Shielding Design
  • Radiation Safety Studies
  • Nuclear or Radiological Engineering
  • Radiation Metrology
• Demonstrable experience using radiation transport and shielding codes such as:
  • MCNP
  • MCBEND
  • ATTILA
  • or equivalent modelling tools
• Strong understanding of radiation physics principles and practical engineering application.
• Experience producing or reviewing radiological safety assessments and ALARP justifications.
• Experience supporting system qualification, experimentation, and technical verification in complex or high-integrity environments.
• Strong technical leadership, analytical, and report-writing skills.

This role offers the opportunity to lead technically challenging work in radiation shielding, transport modelling, safety substantiation, detector technologies, and advanced physics analysis, with development pathways in both senior technical specialist and engineering leadership routes.

• Hybrid/flexible working arrangements available.
• Candidates may be subject to security clearance requirements due to the nature of the work.