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Senior Waste Management Physicist

2 weeks ago

Reading, Reading, United Kingdom Amentum Full time £60,000 - £100,000 per year

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 recruiting for a Senior Waste Management Physicist to join our Radioactive Waste Management Consultancy business. Due to the rapid growth of our business in civil nuclear waste management we require more support to deliver and continue to expand our expertise.

We have a leading role in waste strategy, inventory and compliance underpinning the future management of radioactive waste, spent nuclear fuels and nuclear materials. In the UK, we deliver a diverse range of projects for waste producers, waste management organisations and strategic authorities across all aspects of the waste lifecycle. We are delivering similarly interesting and exciting projects across the globe including projects for clients in Norway, Central & Eastern Europe and Japan.

We are looking to recruit a highly motivated candidate as a Senior Waste Management Physicist to play a key role in continuing the growth of our business.

You will join a friendly, highly collaborative, multi-disciplinary group with backgrounds including physics, mathematics, chemistry, engineering, geology and more. The candidate will be expected to support the technical direction of work areas providing waste assessment and disposability advice to waste providers, providing input to our company waste retrievals projects and supporting disposability on behalf of waste management organisations. Supporting activities include modelling or use of scientifically underpinned arguments in areas such as wasteform or container performance, thermal or impact analysis, criticality safety and more.

The vacancy provides an excellent opportunity for those wishing to develop their careers, with potential to lead a key technical area and support the development of a growing team.

We are operating under flexible working arrangements, with a mixture of office-based and home working environments. The role can be based at Harwell, Dorchester, Birchwood or Scrabster and other locations will be considered.

Key Responsibilities:
As a Senior Waste Management Physicist, you will provide technical expertise on a wide variety of projects for customers including radioactive waste management organisations, radioactive waste producers and regulators, both in the UK and overseas. Work includes a wide variety of activities across the areas of integrated radioactive waste management, spent fuels and nuclear materials including:

  • Leading modelling studies in a range of technical areas; this may include simple or complex modelling to underpin safety and compliance requirements. Depending on the experience of the individual, key modelling areas could include:
  • Logistics or lifecycle analysis modelling.
  • Wasteform properties and expected evolution.
  • Container performance and durability.
  • Accident performance (including fire, impact or both).
  • Thermal modelling of radioactive waste under storage, transport or disposal conditions.
  • Criticality safety modelling or assessment across the waste lifecycle.
  • Sensitivity or uncertainty analyses for any of the above.
  • Leading or providing significant input to disposability assurance activities for both Higher Activity Waste and Lower Activity Waste. This includes both the development of disposability submissions (e.g. Waste Characterisation forms for the LLWR or Letter of Compliance submissions for NWS's Geological Disposal programme) and the review of such disposal cases.
  • Producing, and checking calculations, analyses, design basis documentation and technical reports.
  • Delivering high-quality and bespoke technical and strategic support to our clients.
  • Leading interactions with clients and stakeholders to ensure we understand the underlying requirements of our customers, and how we can meet them.
  • Supporting mentoring and skills development for our graduates and other junior staff.
  • Supporting the continued development of our business through identifying, bidding for and winning new work, either with new or existing clients.
  • A degree qualification (or equivalent training and experience) in an appropriate mathematical, physical science or engineering discipline.
  • Significant experience in a comparable role (candidates need experience of some of the technical topic areas described above, but not necessarily all).
  • Ability to identify appropriate modelling and/or assessment approaches for identified requirements, taking into account constraints of time, budget and the level of detail required.
  • Able to clearly document and communicate assumptions that underpin the analyses undertaken and presented.
  • Ability to analyse complex data sets and models, distil the important safety features and communicate concisely with specialists and senior stakeholders.
  • Numerate with excellent technical writing/reviewing skills.
  • High attention to detail in support of quality assurance requirements.
  • Adaptable and able to work on a variety of projects, prioritising as appropriate.

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 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.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.