Project Manager

Amentum is a global leader in engineering, project and programme management, and solutions integration. Founded on programme, project, and engineering experience—combined with deep-seated specialist capabilities—Amentum has become a recognised delivery partner across major UK Government and commercial programmes.
Our Defence & Security business supports the UK Ministry of Defence in the delivery of their capabilities and objectives via a host of frameworks, not least the Project Delivery Partner framework, which sees us delivering Project Management, Project Controls, and Operational Delivery support across the land, sea, air, and corporate domains. The work we do is of international importance in ensuring our national security and that of our allies—something our team is proud to support. The framework enables our employees to traverse a range of innovative programmes and projects, which challenge them and ensure they develop their skills to the highest levels. The support structures we have in place ensure our employee welfare and career development are achieved to the highest standards.
People are our greatest asset, and we offer a competitive package to retain and attract the best talent. In addition to the benefits you would expect, UK employees also receive free single medical cover and a 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 programmes that incorporate matched funding, paid volunteering time, and charitable donations.
About the Opportunity:
We are looking for enthusiastic Project Managers with proven delivery experience to join our expanding team. In this exciting role, you will play a pivotal part in supporting our clients to successfully deliver highly complex programmes across the built environment.
The position is primarily based in Portsmouth and the surrounding area, with a requirement to be on-site at least one day per week, with the remainder of the week offering hybrid or remote working flexibility.
What You’ll Be Doing:
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Understand, and deliver in accordance with, organisational policies, processes, and procedures.
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Support the development and assurance of business cases as part of wider approval processes.
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Analyse, develop, support, and manage the timely and cost-effective delivery of client projects, meeting business and environmental objectives.
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Influence, support, and expedite client project delivery through effective planning, monitoring, controlling, and reporting of project performance.
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Identify and effectively manage project assumptions and dependencies.
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Support identification of slippage and risk, and implement remedial or mitigating actions, ensuring compliance with all relevant safety, environmental, and management procedures.
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Champion the application of appropriate programme and project delivery strategies and commercial vehicles to secure successful business outcomes.
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Ensure appropriate services to the project are coordinated and delivered through technical, engineering, project controls, commercial, and financial support functions.
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Maintain project records, information, and history accurately and in line with policy.
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Ensure learning from experience is captured and apply continuous improvement techniques to project delivery.
Here’s What You’ll Need:
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Significant track record of successfully delivering projects in line with time, cost, and quality constraints.
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Ability to operate autonomously, with authority, and skilled in developing and maintaining key relationships.
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Consultancy focus with a proven history of identifying and delivering client requirements, and the ability to scope wider business opportunities.
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Expertise in P3M practices, methodologies, and techniques, and their appropriate application to varied environments.
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Highly skilled in the provision of coaching and mentoring.
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Ability and willingness to attain security clearance, which includes being resident in the UK for the preceding 5 years.
Desirable Skills and Qualifications:
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Educated to degree level or equivalent in a relevant subject.
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APM PFQ/PMQ qualification.
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Strong knowledge of the Defence industry and experience working in a high-profile Tier 1, Prime, and/or subcontractor organisation.
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Membership of the Association for Project Management (MAPM) is advantageous.
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PRINCE2 or Agile Practitioner qualification.
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Managing Successful Programmes (MSP) Practitioner (desirable but not essential).
What’s in It for You:
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Competitive salary and benefits package, with unrivalled salary sacrifice schemes available.
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Free single medical cover and digital GP service.
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Generous pension contributions.
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Enhanced parental leave and family-friendly policies.
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Professional development support and membership reimbursement.
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Access to a flexible benefits programme tailored to your needs, including buying or selling up to 10 days’ extra holiday.
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Hybrid and flexible working options to support work–life balance.
Our Culture:
We partner with VERCIDA to help us attract and retain diverse talent. For greater online accessibility, please visit Promoting Equality & Diversity in Jobs and Career - VERCIDA 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.
Your application experience is important to us and we’re keen to adapt to make every interaction even better. We welcome feedback on our recruitment process and if you need more from us before deciding to join us then please, contact us