Infrastructure Project Manager

Amentum; United Kingdom; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

Amentum is seeking an experienced Project Manager for our Defence & Security sector in the UK. You will lead complex, security-sensitive infrastructure projects, coordinating across government and industry to ensure timely, within-budget delivery while maintaining safety and governance standards.

You will join a regulated environment requiring UK residency and security clearance. The role supports hybrid on-site work with UK MoD projects and international opportunities within a robust framework.

Qualifications

• Significant track record delivering projects on time, cost, and quality.
• Ability to operate autonomously and build key relationships.
• Consultancy focus with ability to scope wider business opportunities.

Responsibilities

• Understand and deliver in accordance with organisational policies, processes and procedures.
• Support development and assurance of business cases as part of wider approval processes.
• Analyse, develop and manage timely and cost-effective delivery of client projects.
• Influence and expedite client project delivery through planning, monitoring, and reporting.
• Identify and manage project assumptions and dependencies.
• Support risk identification and remediation while ensuring safety and environmental compliance.
• Champion appropriate programme and project delivery strategies to secure outcomes.
• Coordinate services across technical, engineering, project controls, commercial and financial support functions.
• Maintain project records and apply continuous improvement in delivery.

Skills

Project management

Autonomy

Stakeholder management

P3M practices

Coaching & mentoring

Security clearance (UK resident)

Education

Degree level education

MAPM / PFQ/PMQ

PRINCE2 or Agile Practitioner

MSP

Job description

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

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.

We are seeking enthusiastic Project Managers with a strong track record of delivering infrastructure and built environment projects within the defence sector to join our expanding team. In this role, you will play a key part in supporting clients across complex, security-sensitive programmes, contributing to the planning, coordination, and execution of critical defence infrastructure initiatives.

You will bring experience operating within highly regulated environments, with a clear understanding of the governance, assurance, and delivery challenges associated with defence estates and secure facilities. Working closely with stakeholders across government and industry, you will help enable the successful delivery of strategically important programmes that underpin national capability and operational readiness.

This role requires 3 days a week on site.

What You’ll Be Doing

• Understand, and deliver in accordance with, organisational policies, processes, and procedures.
• Support the development and assurance of business cases as part of wider approval processes.
• Analyse, develop, support, and manage the timely and cost-effective delivery of client projects, meeting business and environmental objectives.
• Influence, support, and expedite client project delivery through effective planning, monitoring, controlling, and reporting of project performance.
• Identify and effectively manage project assumptions and dependencies.
• Support identification of slippage and risk, and implement remedial or mitigating actions, ensuring compliance with all relevant safety, environmental, and management procedures.
• Champion the application of appropriate programme and project delivery strategies and commercial vehicles to secure successful business outcomes.
• Ensure appropriate services to the project are coordinated and delivered through technical, engineering, project controls, commercial, and financial support functions.
• Maintain project records, information, and history accurately and in line with policy.
• Ensure learning from experience is captured and apply continuous improvement techniques to project delivery.

Here’s What You’ll Need

• Significant track record of successfully delivering projects in line with time, cost, and quality constraints.
• Ability to operate autonomously, with authority, and skilled in developing and maintaining key relationships.
• Consultancy focus with a proven history of identifying and delivering client requirements, and the ability to scope wider business opportunities.
• Expertise in P3M practices, methodologies, and techniques, and their appropriate application to varied environments.
• Highly skilled in the provision of coaching and mentoring.
• Ability and willingness to attain security clearance, which includes being resident in the UK for the preceding 5 years.

Desirable Skills and Qualifications

• Educated to degree level or equivalent in a relevant subject.
• APM PFQ/PMQ qualification.
• Strong knowledge of the Defence industry and experience working in a high-profile Tier 1, Prime, and/or subcontractor organisation.
• Membership of the Association for Project Management (MAPM) is advantageous.
• PRINCE2 or Agile Practitioner qualification.
• Managing Successful Programmes (MSP)

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 [e-mail]