Technical Subject Matter Expert (SME)

Amentum Services, Inc.; England; Hybrid; GBP 65,000 - 85,000; Full time

Job summary

A leading engineering solutions provider in the UK is seeking a Technical Authority to oversee design and engineering projects in the defense sector. The ideal candidate will be a Chartered engineer with extensive experience in regulated environments and strong problem-solving abilities. This mid-senior level position offers a full-time employment opportunity with a focus on collaboration and innovation.

Benefits

Free single medical cover

Digital GP service

Enhanced parental leave pay

Qualifications

• Recognised technical expert in a relevant engineering discipline.
• Extensive experience in regulated environments.
• Proven ability to lead technical assurance and solve complex engineering problems.

Responsibilities

• Act as the technical authority in your discipline.
• Support project teams with specialist knowledge to resolve engineering challenges.
• Lead technical reviews, design assurance activities, and risk assessments.

Skills

Technical authority in engineering discipline

Strong communication skills

Stakeholder engagement

Complex problem-solving

Education

Chartered engineer with relevant institution

Job description

About Amentum

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

Amentum is the Design & Engineering partner within the Programme and Project Partners (PPP) framework at Sellafield — a 20-year strategic alliance delivering £7bn of major infrastructure projects.

What You’ll Be Doing:

• Act as the technical authority in your discipline, providing expert guidance across design, delivery, and assurance phases.
• Support project teams with specialist knowledge to resolve complex engineering challenges.
• Lead and contribute to technical reviews, design assurance activities, and risk assessments.
• Ensure compliance with regulatory standards, safety requirements, and industry best practices.
• Collaborate with internal and external stakeholders to ensure technical integration and alignment.
• Mentor engineers and contribute to the development of technical capability across the organisation.
• Influence strategy and decision-making through technical insight and evidence-based recommendations.

What We’re Looking For:

• Recognised technical expert in a relevant engineering discipline, Chartered with a relevant institution.
• Extensive experience in regulated environments (e.g. nuclear, defence, infrastructure).
• Proven ability to lead technical assurance and solve complex engineering problems.
• Strong communication and stakeholder engagement skills.
• Experience supporting large-scale project delivery and multidisciplinary teams.

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.

Additional Information

Seniority level: Mid-Senior level
Employment type: Full-time
Job function: Engineering and Information Technology
Industries: Defense and Space Manufacturing

Equal Opportunity Statement

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.