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Salary
≈ $61k – $101k per year (Estimated)
Location
Hybrid (Warrington, Glasgow, Bristol, Newcastle upon Tyne, United Kingdom)
Seniority
Principal
Visa
Licensed UK visa sponsor
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 18, 2026. First seen by Alion on Oct 6, 2026.

Overview
Company
Impact
Profile match
Amentum is a US government and critical infrastructure services contractor headquartered in Chantilly, Virginia, providing engineering, technical, mission support and operations services in defense, intelligence, space, energy and environment markets. It has about 50,000 employees in more than 70 countries, is listed on the New York Stock Exchange, and absorbed PAE in 2022 before combining with the Jacobs critical mission solutions business in 2024. Openings include aerospace, GN&C and reliability engineers, aircraft workers, database administrators, software engineers, biometric enrollment specialists and paralegals.

Amentum will 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 and diverse 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. We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations.

About the Opportunity:

Amentum is currently recruiting for Principal Fire Protection Engineer to join our Energy business and fire engineering team which has grown significantly recently in as a result of our customer demand.

The department is entering an exciting phase of opportunity by supporting our key client’s UK nuclear fleet through a business transformation, and by supporting new small modular reactor developers. Our work is varied, covering New Build, Generation, Life Extension, and Defueling, and our capabilities are in demand across the nuclear sector.

This is a hybrid role which can be based be based out of any of our Amentum Energy offices (e.g. Newcastle, Glasgow, Warrington, Gloucester, Bristol, Knutsford etc). We put flexibility at the heart of what we do and we’re happy to consider flexible working patterns.

Key Responsibilities:

  • Independently plan and execute complex fire protection technical assignments, including the system design of fire detection and alarm system systems, fire fighting and suppression systems to codes/standards/regulations.
  • Develop, coordinate, and review technical deliverables such as fire system calculations, design inputs, layouts, specifications, design-basis documents, system narratives, cause-and-effect documentation, technical assessments, reports, work plans, and technical correspondence.
  • Resolve routine and complex technical issues within assigned scopes and identify matters requiring escalation to discipline manager, regulatory-support function, or other designated authority.
  • Lead assigned technical interfaces with internal stakeholders, clients, key fire safety stakeholders, and other disciplines, including presenting technical issues, explaining assumptions, documenting decisions, and supporting resolution of comments.
  • Independently plan and execute complex passive fire protection technical assignments, including providing advice on fire compartmentation, fire dampers, fire doors and fire stopping (Desirable not essential).

Education, Experience and Skills:

  • STEM degree qualified (Desirable not essential)
  • Membership with a recognised institution (Institution of fire engineers - Desirable not essential)
  • Fire protection engineering experience, ideally covering most of the key responsibilities listed above
  • Experience of application and use of relevant prescriptive codes (Use of NFPA codes is desirable but not essential)

Our Culture:

Our values stand on a foundation of safety, integrity, inclusion and diversity. We put people at the heart of our business, and we genuinely believe that we all succeed by supporting one another through our culture of caring. We value positive mental health and a sense of belonging for all employees.

We aim to embed inclusion and diversity in everything we do. We know that if we are inclusive, we’re more connected, and if we are diverse, we’re more creative. We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave. This is reflected in our wide range of Global Employee Networks centred on inclusion and diversity.

We partner with VERCIDA to help us attract and retain diverse talent. 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.

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