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.
Amentum is a key delivery partner within the Decommissioning and Nuclear Waste Partners (DNWP) Framework, a major Sellafield programme worth up to £4.6 billion and running for up to 15 years. The framework is focused on safely accelerating decommissioning, remediation and high‑hazard risk reduction across one of the most complex nuclear sites in the world.
Our nuclear team supports the front‑end design, engineering, technical leadership and delivery expertise required across the DNWP portfolio. We are looking for individuals with high‑value expertise from across regulated and comparable sectors to who can work collaboratively, embrace new challenges and contribute to the mission of safely and efficiently delivering Sellafield’s decommissioning and nuclear waste objectives.
About the Opportunity
We are seeking a Project Director to lead delivery of remediation project within the DNWP framework, joining a high‑performing, client‑facing team on a major infrastructure programme at the Sellafield site. This role sits within an integrated project team responsible for the full lifecycle development and delivery of critical site improvements.
You will bring proven experience of leading complex projects from concept through design and construction, working within a structured, stage‑gated delivery model aligned to APM principles. As a confident and adaptable leader, you will inspire and manage a large multidisciplinary team, driving collaborative behaviours supported by programme KPIs and incentive mechanisms.
The role requires senior leadership capability within an operational, nuclear‑licensed environment, contributing to a focused and collaborative programme of development across the site.
Key Responsibilities:
Provide overall leadership and direction for the remediation projects within the DNWP Framework, ensuring successful delivery in line with agreed scope, cost, schedule, quality, and safety objectives.
Act as the primary senior interface with the client, framework partners, and key stakeholders, fostering a collaborative, transparent, and high‑trust working relationship aligned to programme KPIs and incentive mechanisms.
Lead and manage a large, multidisciplinary project team, promoting a strong safety culture, high standards of performance, and effective collaboration across engineering, commercial, planning, and delivery functions.
Oversee all phases of the project lifecycle, from concept development through detailed design and construction/implementation, ensuring compliance with the client’s linear integrated project lifecycle (APM‑equivalent) governance, stage gates, and assurance requirements.
Ensure delivery activities are fully compliant with nuclear site licence conditions, UK health, safety and environmental legislation, and internal quality, security, and safety management systems.
Provide strategic direction on project planning, risk management, change control, and performance reporting, ensuring informed decision‑making and effective mitigation of programme and project risks.
Manage project budgets and commercial performance, working closely with commercial teams to control costs, manage variations, and deliver value for money while meeting contractual obligations.
Champion continuous improvement and best practice in project and programme delivery, driving efficiencies, innovation, and learning across the project and wider framework.
Support the Framework Director in programme‑level governance, reporting, and stakeholder engagement, contributing to strategic planning and long‑term framework objectives.
Develop, mentor, and retain high‑performing talent within the project team, ensuring appropriate capability, succession planning, and professional development in a highly regulated environment.
Essential Qualifications & Experience
Minimum 8 years of experience in similar project / programme management and leadership role.
Skilled in leading complex, multi-disciplinary programmes under NEC4 contracts.
Proven track record of managing specialist sub-contractors.
Evidence of understanding of concept design, development processes and their governance and stage gated processes.
Experience of assurance activities and processes which includes coordinating assurance events and acting as a review member to other programme assurance events.
Demonstrable evidence of honesty, drive and commitment with the ability to motivate others.
Experience of Microsoft packages particularly the use of Excel for the detailed analysis of large and complex data sets.
Capable of effective multi-task working, identifying and managing priorities and working to challenging time scales
Experience embedding quality and safety practices.
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 the team.
Compensation Details:
GBP
The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.
Benefits Overview:
Our health and welfare benefits are designed to support you and your priorities. Offerings include:
Health, dental, and vision insurance
Paid time off and holidays
Retirement benefits (including 401(k) matching)
Educational reimbursement
Parental leave
Employee stock purchase plan
Tax-saving options
Disability and life insurance
Pet insurance
Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.
Original Posting:
04/30/2026 - Until Filled
Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.
Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.
