At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you're passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive.

Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all.

We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive team who always strive to do the right thing for our people, clients and communities.

People are our greatest asset, and we offer a competitive package to retain and attract the best talent.

In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships.

Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.

About the Opportunity

We are currently recruiting for a Monte Carlo methods developer to join a cutting-edge development team for simulation of Radiation Transport and Reactor Physics. The role involves methods and software development to support the development of our software and nuclear data products, perform complex technical analyses and deliver technical training.

The nuclear industry is moving away from traditional reactor designs towards new small modular reactor (SMR) and advanced modular reactor (AMR) designs, claiming improved safety features and lower build costs. The medical world is using new radiation therapies such as proton beam therapy and flash radiotherapy to treat complex cancers. The space industry is pushing the envelope on future mission profiles, increasing demands on shielding capabilities for both people and equipment. These new concepts bring exciting new modelling challenges and require the introduction of innovative approaches in mathematics, physics, engineering and software development.

The ANSWERS® Software Service has, for almost 40 years, provided customers with high quality software and consultancy services in nuclear criticality, reactor physics, radiation shielding, dosimetry and nuclear data. ANSWERS codes are widely used in more than 30 countries around the world. Our global customer base helps us to stay at the forefront of nuclear code use and develop solutions that can be applied to all reactor systems and all stages of the fuel lifecycle. The insights gained from our interactions with customers are embedded in the software and applications we develop, used around the world, across our full range of engineering services.

ANSWERS are looking for an enthusiastic and innovative individual with strong experience in Monte Carlo simulations to work in a variety of technical teams, developing and maintaining our state-of-the-art computational analysis codes, and assisting with analysis work for a broad range of established and cutting-edge reactor designs, clinical treatments and space shielding applications.
This role will present excellent opportunities for an individual looking to deepen their skills and experience in radiation transport physics. This knowledge will be applied on projects in nuclear engineering, medical physics and space shielding. The projects will provide professional development in leading technical work and collaborating with industry, academia and the international community, from small teams to large interdisciplinary projects.

This role will be based at either our Dorchester or Warrington offices, with the opportunity to travel to client sites, conferences and workshops etc. as required. Some home / remote working is also available, and consideration will also be given in respect to part time & flexible working hours.

Key Responsibilities

Code developer of radiation transport and reactor physics codes
Development of underpinning mathematical and physical theories in our codes
Complex radiation transport analysis
Delivering technical training courses to a specialist audience
Working as a team to develop and refine theoretical models and computational simulations
Presenting results at technical meetings and conferences (where appropriate)
Interfacing closely with the international academic research community
Generating new business through interaction with international commercial customers

Qualifications, Skills & Experience

An undergraduate degree in mathematics, physics or engineering, or any other subject with a strong mathematical component
Experience in the application of Monte Carlo methods to modelling radiation transport
A strong background in mathematical and physical theory and its implementation in computational modelling software
Programming skills in languages such as Fortran, Python or Java
Ability to think innovatively and to solve complex problems
Ability to quickly and efficiently absorb new technical skills
Self-motivated, with a genuine passion for the field of radiation transport/ nuclear physics
Excellent problem-solving skills and the ability to work both independently and collaboratively

Our Culture

Our values are built on a strong foundation of safety, integrity, and respect for every individual. People are at the heart of our mission, and we believe in supporting one another through a culture of care and collaboration.

We strive to create a workplace where everyone feels they belong and can thrive. Supporting mental wellbeing and fostering a sense of connection are essential to how we work.

When we embrace different perspectives and work together, we become more innovative, more agile, and more successful.

We partner with VERCIDA, for greater online accessibility please visit www.vercida.com to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.

If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team.