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About the Role

This is a senior client-side assurance and commercial governance role supporting major heavy civil infrastructure packages at Sizewell C. The position is focused on challenging and validating Target Outturn Cost (TOC) submissions, ensuring procurement strategies, cost estimates, risk allowances, and pre-construction planning are robust, auditable, and aligned with programme objectives.

Responsibilities

• Lead assurance reviews of TOC submissions across major heavy civils packages.
• Challenge cost estimates, risk allowances, pricing methodologies, and commercial assumptions.
• Review QSRA/QCRA analyses and ensure compliance with governance frameworks.
• Support procurement strategy, TOC development, contract reviews, and negotiations.
• Manage key stakeholder interfaces and lead assurance workshops and governance forums.
• Assess project risks, challenge contingencies, and validate value engineering and cost optimisation initiatives.

Requirements

• Experience in major infrastructure/heavy civils.
• Strong background in pre-construction, estimating, procurement, quantity surveying, and commercial management.
• Experience reviewing and challenging TOC/target cost submissions.
• Working knowledge of QSRA/QCRA Monte Carlo risk analysis, contingency management, and cost planning.
• Understanding of NEC/PAA contracting models.
• Ability to lead assurance reviews, stakeholder engagement, and governance forums.
• Tier 1 contractor, consultancy, or major project delivery background.

Location

• UK

Work Type

• Hybrid
• Part-time
• Flexible working hours

Experience Level

• Senior

Education Level

• Degree-qualified in QS, Commercial Management, Civil Engineering, or similar.
• MRICS or equivalent professional accreditation desirable.

Benefits

• Free single medical cover
• Digital GP service
• Enhanced parental leave pay
• Free membership of employee assistance and parental programmes
• Reimbursement towards relevant professional development and memberships

About the Company

• Amentum is a company that tackles the world’s toughest challenges to deliver agile and steadfast solutions to the U.S. government and its allies.
• With more than 50,000 employees on all seven continents and in more than 60 countries, Amentum delivers a broad range of operational support services to meet the critical needs of our clients.
• Headquartered in Chantilly, VA.
• Nuclear Power Programmes has been formed with the vision to support positive change and help shape the future of Nuclear Power.
• Operational throughout the UK and across continental Europe, we are seeking to expand our team on a variety of nuclear projects, which range in technologies and that find themselves at different stages of their development.
• We are seeking to continuously employ talented individuals to join our diverse team that are excited about nuclear projects and are committed to Net Zero, and Energy Security.
• In both client facing and internal roles we are delivering major programme and project management capabilities throughout the project lifecycle.
• We are driving to deliver safe, high quality and to time solutions by thinking innovatively and working collaboratively.

Equal Opportunity

• Our values stand on a foundation of safety, integrity, inclusion and diversity.
• We put people at the heart of our business, and we genuinely believe that we all succeed by supporting one another through our culture of caring.
• We value positive mental health and a sense of belonging for all employees.
• We aim to embed inclusion in everything we do.
• We accept people for who they are, regardless of age, disability, gender identity, gender expression, marital status, mental health, race, faith or belief, sexual orientation, socioeconomic background, and whether you’re pregnant or on family leave.
• 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 the team.
• Amentum has become aware of unauthorized individuals who are falsely using the Amentum name and /or logo in an attempt to solicit fees from potential job seekers.
• Amentum and its affiliates never charge candidates fees or payments of any kind in order to secure employment.
• Amentum personnel will always send email from an identifiable corporate account (ending in @amentum.com) and never from a public email account like Yahoo!, Google, Gmail, or Hotmail.
• EEO including Disability/Protected Veterans Labor Laws Posters