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Full 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.
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
It is an essential requirement within DNWP framework that all staff hold appropriate security clearance and the Security Vetting team perform a vital role in assisting staff to apply for and renew relevant security clearances and passes.
The role will involve working as part of the Amentum Security Vetting team, predominantly to assist Amentum and our Sub-contractor partnerships to apply for new security clearance and site passes, to assist with renewals and work with the Amentum Security Controller on other security related tasks.
Key Responsibilities:
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Preparing new applications, following new staff/individuals being identified by a project, assisting to initiate applications process, issuing forms, requesting relevant documents. Completing and checking applications, including ensuring queries are answered in a timely manner.
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Preparing renewals – identifying staff/individuals who require renewals from the database, issuing forms and following up to ensure timely renewals.
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Performing progress monitoring, ensuring the relevant records are accurately updated. Checking progress and monitoring forms are returned to the required deadlines. Follow up calls to staff/individuals where required.
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Attending regular security team meetings.
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Assisting with GDPR compliance checks on the data held.
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Compliance checking, assisting the team to run regular checks to ensure that all staff/individuals working on the projects are correctly cleared.
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Drafting security notices and issuing them.
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Assisting the security team with other security tasks e.g., organising training, requesting IT accounts.
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Liaising with the wider support team on DNWP framework e,g. Resourcing, Amentum in-house security team.
Essential Qualifications & Experience
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Demonstrable experience managing personnel security clearances within a licensed nuclear site, ensuring compliance with site, client, and regulatory requirements.
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Experience processing and administering Security Appraisal Forms and vetting documentation (e.g. BPSS, SC or equivalent), maintaining accuracy, confidentiality, and audit readiness.
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Previous experience supporting workforce throughout security clearance and upgrade processes, acting as a knowledgeable point of contact and resolving issues efficiently.
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Maintained and controlled security and workforce data via daily updated spreadsheets and records, previously ensured data integrity and adherence to information security requirements.
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Experience liaising with multi‑disciplinary teams (construction, engineering, safety, HR, security, and management) to meet administrative and site access requirements.
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Previous experience working closely with the management team to promote and maintain a strong nuclear safety culture within the office environment.
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Previously supported compliance with Health, Safety, Security and Environmental (HSSE) standards, escalated and addressed issues in line with site procedures.
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Experience working in a highly regulated environment, with an understanding of the importance of governance, compliance, and procedural adherence.
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NVQ Level (or equivalent) in Business Administration or 3 years’ experience in Administration.
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Advanced proficiency in Microsoft Word, Outlook, PowerPoint and Excel, with experience handling sensitive and controlled information.
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:
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Health, dental, and vision insurance
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Paid time off and holidays
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Retirement benefits (including 401(k) matching)
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Educational reimbursement
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Parental leave
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Employee stock purchase plan
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Tax-saving options
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Disability and life insurance
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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:
04/27/2026 – 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.
