Infrastructure Project Manager

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

Benefits offered by this job

Free medical cover (UK)

Digital GP service

Enhanced parental leave pay

Free membership of employee assistance

Parental programme membership

Reimbursement for professional develop

Hybrid/work-flexible hours

Job summary

Amentum is seeking an experienced Project Manager to join our Defence & Security team in the UK, delivering infrastructure and built environment projects within high-regulation environments. You will manage complex programmes across government and industry, coordinating governance, assurance, and delivery across multiple stakeholders.

You will operate in a framework that supports national security objectives, with a clear focus on planning, cost control, and on-time delivery while maintaining

Qualifications

• Significant track record delivering projects on time, within budget and to quality.
• Autonomous with strong relationship building.
• Consultancy-focused with ability to scope wider client requirements.
• Expertise in P3M practices and techniques and their application.

Responsibilities

• 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.

Skills

Project governance

Stakeholder management

P3M methodologies

Proposal development

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