Job Description

Overview

AtkinsRéalis is a leading international consultancy, delivering complex, high-value programmes across the UK and Europe. We are recognised for our expertise in mission-critical infrastructure, innovation, and collaborative delivery across major projects. We are committed to fostering an inclusive, flexible, and high-performing working environment where our people can thrive. At AtkinsRéalis, we value individuality, support career progression, and empower our teams to deliver exceptional outcomes for our clients.

As part of our continued growth in Wales, we are seeking a Senior Managing Cost Manager with strong experience in advanced technology and data centre programmes, alongside broader infrastructure and built environment sectors. This is a key leadership role with responsibility for commercial oversight, client engagement, and team development, supporting the delivery of complex, cutting-edge projects across the region. You will play an integral role in strengthening our cost management capability, developing client relationships, and shaping the growth of our Wales business.

We welcome applications from candidates seeking full-time, part-time, or flexible working arrangements.

Your role

• Lead the delivery of cost and commercial management services across complex programmes, including data centres and mission-critical facilities.
• Provide strategic cost advice across the full project lifecycle, from feasibility through to final account.
• Act as a senior client interface, developing and maintaining trusted relationships with key stakeholders.
• Take ownership of project commercial performance, ensuring robust cost control, forecasting, and risk management.
• Support business development activities, including bids, proposals, and client presentations.
• Contribute to the growth of the Wales business, including capability development and team expansion.
• Collaborate across disciplines and regions to deliver integrated, value-driven solutions.
• Mentor and develop junior team members, fostering a high-performance and inclusive culture.
• Ensure consistent application of best practice, governance, and commercial processes.
• Promote the AtkinsRéalis Cost Management capability in the regional marketplace.

Our portfolio spans a diverse range of sectors, including:

• Advanced Technology & Data Centres.
• Energy & Net Zero Transition.
• Public Sector & Education.
• Commercial & Workplace.
• Defence & Infrastructure.
• Ports, Marine & Aviation.
• Manufacturing & Utilities

We are proud to support major investment programmes and transformational projects across Wales and the wider UK.

About you

You will bring:

• Chartered status (MRICS or equivalent).
• Strong experience in cost management of complex, high-value projects, ideally including data centres or mission-critical environments.
• Proven ability to manage commercial delivery across pre- and post-contract stages.
• Experience in contract administration (e.g. NEC and/or standard UK forms).
• Demonstrated capability in client-facing roles and stakeholder management.
• A strong understanding of the Welsh and wider UK construction market.
• A track record in winning work and supporting business growth.
• Excellent commercial awareness, analytical skills, and attention to detail.
• Strong leadership, communication, and team development skills.

Rewards & benefits

Explore the rewards and benefits that help you thrive – at every stage of your life and your career. Enjoy competitive salaries, employee rewards and a brilliant range of benefits you can tailor to suit your own health, wellbeing, financial and lifestyle choices. Make the most of a myriad of opportunities for training and professional development to grow your skills and expertise. And combine our hybrid working culture and flexible holiday allowances to balance a great job and fulfilling personal life.

Be rewarded. Find out more.

About AtkinsRéalis

We're AtkinsRéalis, a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world's infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We're committed to leading our clients across our various end markets to engineer a better future for our planet and its people.

Find out more.

Additional information

Security clearance

This role may require security clearance and offers of employment will be dependent on obtaining the relevant level of clearance. If this is necessary, it will be discussed with you at interview. The vetting process is delivered by United Kingdom Security Vetting (UKSV) and may require candidates to provide proof of residency in the UK of 5 years or longer. If applying to this role please do not make reference to (in conversation) or include in your application or CV, details of any current or previously held security clearance.

We are committed to creating a culture where everyone feels that they belong - a place where we can all be ourselves, thrive and develop to be the best we can be. So, we offer a range of family friendly, inclusive employment policies, flexible working arrangements and employee resource groups to support all employees. As an Equal Opportunities Employer, we value applications from all backgrounds, cultures and ability. As a Disability Confident Leader, we are committed to offering an interview to all applicants who have a disability and meet the essential criteria. If you would like to be considered under this commitment, please let us know at the application stage.

#LI-INFRASTRUCTURE | #LI-UK

Worker Type

Job Type

At AtkinsRéalis, we seek to hire individuals with diverse characteristics, backgrounds and perspectives. We strongly believe that world-class talent makes no distinctions based on gender, ethnic or national origin, sexual identity and orientation, age, religion or disability, but enriches itself through these differences.