Commissioning Manager

About the Opportunity:

Amentum is expanding its ability to support a growing portfolio of projects across the Defence, Nuclear, Energy, Environment and Government-Owned Critical Infrastructure sectors. We are seeking talented people who are motivated by technical problem-solving, collaboration and the opportunity to deliver innovative solutions for some of the UK's most significant infrastructure projects.

The Commissioning Manager is accountable for establishing the programme-wide commissioning, operational readiness and handover framework for the FCAS Infrastructure Programme.

The role will ensure that all future projects are designed, delivered, tested, commissioned and handed over in a safe, compliant and operationally ready state, supporting the successful transition of facilities into service across the FCAS portfolio.

Working closely with Programme Directors, Project Managers, Defence stakeholders, and supply chain partners, the Programme Controls Lead will enable informed decision-making and effective programme governance within a highly regulated and security-conscious environment.

Key Responsibilities:

Commissioning, Operational Readiness & Handover Leadership
Lead the development and governance of programme-wide commissioning, testing, operational readiness and handover frameworks, ensuring effective integration with design, delivery and project controls. Establish assurance, acceptance and operational readiness processes, oversee testing and verification activities, and ensure all asset information, documentation and operational requirements are in place to achieve successful facility handover and operational acceptance.

Mobilisation Deliverables
Establish the commissioning, operational readiness and handover strategy, framework, processes, controls, standards and assurance requirements necessary to support successful testing, acceptance and transition to operations.

Key Interfaces
Collaborate with internal programme, delivery, controls, technical and commercial teams, alongside client, contractor, consultant and regulatory stakeholders to ensure effective commissioning and handover outcomes.

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.

Here’s What You’ll Need:

Essential:

- Experience leading commissioning, testing, operational readiness and handover activities on major infrastructure, defence or complex engineering programmes, with strong stakeholder management and assurance capability.

Success Measures

- Establish a scalable commissioning, operational readiness and handover capability that delivers defined governance, testing, acceptance and operational readiness requirements across the programme.

Mobilisation Objective

- Establish the commissioning and operational readiness function required to ensure FCAS infrastructure projects are safely, compliantly and effectively transitioned into operational service.

Desirable:

- Defence or aerospace experience, ORAT, NEC, ISO 55000, ISO 19650 and mission-critical infrastructure knowledge.

What’s in It for You:

- Competitive salary and benefits package, with unrivalled salary sacrifice schemes available.
- Free single medical cover and digital GP service.
- Generous pension contributions.
- Enhanced parental leave and family-friendly policies.
- Professional development support and membership reimbursement.
- Access to a flexible benefits programme tailored to your needs, including buying or selling up to 10 days’ extra holiday.
- Hybrid and flexible working options to support work–life balance.

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 [email protected]