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Senior Physicist

Posted: February 8th, 2024



Warrington, United Kingdom

The Company

Mirion Technologies, a US company is a leader in radiation safety, measurement and science. Built on over 50 years of experience in research, problem-solving and product development, our team of nearly 3,000 talented professionals globally work to create solutions and advance innovation in our field.

We’re more than just product makers and problem solvers. We also draw on a deep sense of responsibility to share our knowledge and expertise with our customers. Although we are a large, growing corporation, we are small enough for you to be creative and autonomous.

Our company is dedicated to providing world-class radiation detection, protection, and measurement products, services, and solutions.

The Role

Are you a Senior Physicist with a passion for advancing nuclear measurement technologies?

Seize the opportunity to lead and innovate as we seek a dynamic, experienced individual to join our highly successful global company based at our Warrington facility.

In this role, you will be a key member of our innovative Physics team, responsible for the supply of non-destructive assay equipment for performing nuclear measurements, mainly in support of decommissioning, disposal and waste management activities across the UK and elsewhere.

As a senior member of the team, you will play a key role in the design, build calibration, testing and delivery of bespoke measurement systems to meet the specific requirements of our customers and for providing measurement and expertise services in related applications.

For the systems build work you will be expected to provide the physics expertise (e.g., mathematical modelling and data analysis for evaluation of the performance of the measurement system). You will often be required to act as the Technical Lead in the projects we undertake, having oversight and responsibility for ensuring the technical requirements of the project are met whilst working closely with a project manager.

You may also be called upon to plan and participate in projects to supply measurement services and consultancy to our customers. Measurement services work involves performing radiometric measurements at customer sites using Mirion owned equipment or using radiometric equipment owned by the customer (e.g. for annual calibration). Consultancy work involves providing advice to our customers on radiometric measurements to meet their specific needs to meet regulatory requirements e.g. for transportation, disposal, nuclear safety, nuclear materials control and accountability etc. Such work often involves mathematical modelling of the performance of measurement equipment against the specific requirements in a given measurement application.

This is a full-time hybrid role based in Warrington and belongs to the Industrial Division, Europe and Asia reporting to the Physics Team Manager. Travel to various sites (UK and abroad) may be required as a significant proportion of the work takes place at our customer sites and it is expected for you to work closely with members of our Service and Sales teams based at Harwell, Seascale and Forss as appropriate.,

Join us in pushing boundaries of what is possible in nuclear science and contribute to the responsible advancement of this critical field.

Key Responsibilities

The Senior Physicist responsibilities will include, but are not limited to:

  • Providing the primary physics expertise for projects meeting the required customer standards and Mirion Technologies QA procedures.
  • Act as Technical Lead with technical oversight of the activities of all technical disciplines within named project teams.
  • Produce the preparation of technical documentation (project design documents, test specifications, safety documents, calibration documents, physics analysis reports, consultancy reports, quality procedures, conference papers).
  • Liaise with the physics and projects teams and contribute to the design, development and commissioning of radiometric assay systems, as required for assigned projects.
  • Assist with preparation of tender submissions and proposals for radiometric assay equipment, measurement and consultancy services and other projects.
  • Be involved with the development of new radiometric techniques by participating in Mirion Technologies and international development activities.
  • Present technical work at internal and customer meetings, conferences, workshops and sales-related events.
  • Provide training material and participate in the training of Mirion and customer personnel, as required, on relevant topics related to non-destructive assay techniques.

The Person

The key skills and qualities required for this role as Senior Physicist are:


  • Physics, Applied Physics or equivalent degree.
  • In depth working knowledge of radiation measurement, in particular non-destructive assay measurement techniques, factors affecting accuracy and detection limits.
  • Good understanding of the treatment of measurement uncertainties.
  • Extensive practical experience of solving radiometric assay problems using laboratory equipment.
  • Comfortable with using numerical analysis techniques, programming, spreadsheets.
  • Good working knowledge of commonly available software, including but not limited to gamma spectrometry acquisition and analysis software, isotopic analysis codes, neutron coincidence and neutron multiplicity software.
  • Able to deal with, and understand, technically complex problems.
  • Strong verbal and written communication skills.
  • Good team working and interpersonal skills: providing mentoring on non-destructive assay to junior personnel and to personnel from other technical disciplines, as required.
  • Excellent organisational skills.
  • Ability to delegate tasks to manage workload.
  • Able to be SC- or DV-cleared.

An advantage

  • Knowledge/experience of nuclear reactor physics/fuel cycles, or radioactive waste management practices and regulations.
  • Good working knowledge of radiation transport modelling for radiometric measurement applications using codes such as MCNP.
  • Experience of working on nuclear licensed sites, eg. Magnox, Sellafield.


Our employees make the difference. And that's why we offer you as Senior Physicist:

  • Salary from £60k (depending on experience) plus competitive benefits package.
  • The opportunity to work on cutting-edge projects in a specialised industry.
  • Ongoing career growth and professional development opportunities.
  • A collaborative and supportive work environment.

If you are interested in our vacancy and wish to apply, please email your CV to Alison Corbett, Talent Acquisition Manager (UK) [email protected].


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