ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement & support sustainable transformation.

Our teams of passionate and agile engineers work on cutting-edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today.

Join us and start building tomorrow’s world today!

As a Radiation Physicist Engineer, you will join Derby team to support our activities within the Nuclear sector. 

This is a great opportunity to apply advanced nuclear physics knowledge in a high-impact, regulated environment, working closely with multidisciplinary teams on reactor systems, shielding design, and compliance with nuclear safety standards.

• Location: Remote 
• On Site: None 
• Clearance: BPSS 
• Experience Level: 1- 10 YOE 

Key Responsibilities:

• Modelling and simulating radiation transport using industry-recognised tools.
• Supporting the design of radiation shielding and protection systems for nuclear facilities.
• Conducting dose rate calculations, activation analyses, and radiological assessments.
• Interpreting and applying nuclear safety standards and radiation protection regulations.
• Collaborating with engineers and safety teams to ensure compliance throughout the lifecycle of the project.
• Preparing technical documentation and presenting analysis results to internal stakeholders.

Required Skills:

• Solid foundation in nuclear or radiation physics.
• Experience in radiation shielding, protection, or transport modelling.
• Hands-on experience with Monte Carlo simulation codes – ideally MCNP.
• Exposure to Attila4MC or similar deterministic transport software (a bonus).
• Familiarity with nuclear regulatory requirements and radiological safety standards.
• Strong communication skills and ability to document technical findings clearly.

Required Qualifications:

• A Bachelor’s or Master’s Degree in Physics, Nuclear Engineering, or equivalent military experience.

Desirable Skills:

• Experience in nuclear, power generation, or other safety-critical industries

Why join us? 

We bring together entrepreneurial, tech-driven people to deliver innovative solutions for leading companies.

At ALTEN, you’ll work on exciting projects, supported by ongoing learning, mentoring, and clear career development tailored to your goals.

Join a passionate team and help build tomorrow, today.

In short you get: 

• A personalised career path and a rewarding management style 
• A huge diversity of engineering projects and industries
• Private Medical Insurance
• Cycle & Tech Scheme 
• Employee assistance programme
• Life insurance & Pension Scheme
• Social atmosphere, regular gatherings & team buildings
• Flexible way of working (role dependent)

We are proud to support the Armed Forces Covenant & actively encourage applications from members of the Armed Forces community, including veterans, reservists, service leavers, and military spouses/partners. We recognise the value of military skills and experience and are committed to ensuring that no applicant is unfairly disadvantaged during our recruitment and selection processes. 

This role may require you to have or be willing to go through Security Clearance. As part of the onboarding process candidates will be asked to complete a Baseline Personnel Security Standard; details of the evidence required to apply may be found on the government website Gov.UK. If you are unable to meet this and any associated criteria, then your employment may be delayed, or rejected . Details of this will be discussed with you at interview.