Project Manager – Geotechnical Sub-Alliance; GSA

About the role

We’re looking for an experienced Project Manager to play a key role in delivering one of the UK’s most significant infrastructure projects. As part of the Geotechnical Sub-Alliance (GSA) at Sizewell C, you’ll lead complex ground engineering works that are critical to preparing the site for a new nuclear power station.

This is a senior leadership role with full accountability for project performance across safety, quality, programme, and commercial outcomes. You’ll be working within a collaborative NEC4 Alliance environment, leading multidisciplinary teams and specialist supply chain partners.

• Take full accountability for project delivery across safety, quality, programme, and commercial performance
• Lead and integrate operations, design, plant, procurement, and commercial functions for geotechnical works (e.g. diaphragm walling, soil mixing, piling)
• Set and drive high standards of performance, governance, and delivery across the project
• Champion a Zero Harm culture, including leading investigations, setting safety KPIs, and ensuring close-out of actions
• Establish and oversee quality strategy, audits, and compliance with ITPs and client requirements
• Own the master programme, including critical path management, sequencing, and mitigation of risks and delays
• Define and implement procurement strategy, including management of key suppliers and long‑lead items
• Drive productivity improvements and set measurable KPIs aligned to programme and commercial outcomes
• Lead commercial strategy, including forecasting, CVRs, earned value, and contract negotiations
• Provide contractual leadership under NEC4 Alliance, including managing change, early warnings, and compensation events
• Chair risk‑reduction and stakeholder meetings, maintaining strong relationships with the client and alliance partners
• Lead, develop, and manage project teams, including performance, succession planning, and disciplinary processes
• Ensure high standards of communication, including site briefings and client reporting

• Proven experience as a Project Manager on major civil engineering or geotechnical projects
• Strong technical understanding of ground engineering techniques such as diaphragm walling, piling, and soil improvement
• Solid working knowledge of NEC contracts, ideally NEC4 Alliance or Option C/E environments
• Demonstrated ability to manage large, multidisciplinary teams and complex supply chains
• Strong commercial awareness, including experience with forecasting, cost control, and contract negotiations
• Ability to manage and drive programme performance, including critical path and risk management
• Confident stakeholder manager, with experience dealing with clients, partners, and senior leadership
• A proactive, solutions‑focused approach with the ability to make informed decisions under pressure
• Strong leadership skills, with a track record of developing high‑performing teams
• Commitment to high standards of safety, quality, and operational excellence

Day in, day out, our teams deliver some of the UK’s most ambitious, exciting and meaningful projects; developing, building and maintaining the vital infrastructure that supports national economies and strengthens communities.

Why join us?

As if contributing to and supporting work that makes life better for millions wasn’t rewarding enough, we offer a full range of benefits too. You’ll have the freedom to shape the package that’s right for you and your life. Here are some of our key benefits:

• Smart working, giving you more flexibility such as staggered start and finish times, with up to 40% remote working, where roles allow.
• 25 days paid annual leave (pro rata)
• Family friendly policies which include 28 weeks full pay for maternity/adoption leave and four weeks full pay for paternity/partners leave
• Pension, share incentive plan, volunteering leave, recognition schemes and much more…

At Balfour Beatty we believe that diversity and inclusion are essential components of any successful, happy workplace. Through our Value Everyone Diversity and Inclusion Strategy and Action Plan, we are growing our diverse workforce and developing our inclusive culture where everyone is able to thrive and reach their full potential, regardless of their identity or background.

To find out how we are making this a reality, visit

As a Disability Confident Employer, we are committed to working with people who have disabilities and long‑term health conditions to remove barriers for them in obtaining employment. We are also committed to offering applicants with a disability an interview if they meet the minimum requirements for the role. For more info, visit https://disabil