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.
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.
About the Opportunity
We have an exciting opportunity for an Office Administrator to join a current Amentum team delivering a construction project on the nuclear new build site at Hinkley Point C. You will need to be on site 4 days a week with 1 day working from home.
The successful candidate will gain the privilege of joining a multidisciplinary team on an ever-changing site for one of Amentum’s most exciting delivery partners. At Amentum, we provide construction solutions for the most innovative and high-tech clients the UK has to offer.
The above role will initially be a fixed term 9-month contract on the project, responsible for the administration requirements of the construction team, ensuring efficient administration and delivery of our activities across the project. This role is based fulltime, on-site at Hinkley Point C. Duties include, but are not limited to the following:
Providing administrative support to ensure efficient office and project operations.
Arranging meetings, recording meeting minutes, updating action logs, and booking site work areas, as required.
Managing the collation and submission of timesheet information and expenses for the craft team, and any other payroll queries.
Managing the application process for site passes and assisting with site inductions.
Processing Purchase Orders and assisting with the delivery arrangements of goods coming to site.
Assisting the document control and handover team, as required.
Collating and editing presentations as well as assisting management with various ad hoc administrative requirements to meet the needs of the business.
Here’s What You’ll Need
Discretion & trustworthiness required to work on a nuclear licensed site.
Candidate would preferably have experience working on Union based sites, working under agreements such as NAECI.
Strong communication, interpersonal and influencing skills to provide an agile and flexible service.
Ability to work across organisations and to multi-task and work under own initiative.
Able to work under short term pressure to resolve emerging issues in a timely and responsive manner.
Be competent in using all Microsoft office applications.
Ability to react to an ever changing, fast-paced environment.
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:
02/12/2026 - Until FilledAmentum 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.
