Senior CE&I Designer in London

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.

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.

About the Opportunity: Amentum is the Design and Engineering partner for Sellafield under the PPP (Programme and Project Partners). This is a 20‑year arrangement to deliver ~£7bn of major projects. We are looking to recruit high value expertise from across regulated and comparable sectors to work in a collaborative environment. PPP is delivering major projects, site wide improvements and provision of supporting services.

The SIXEP Continuity Plant, being delivered by the Programme and Project Partners (PPP) at Sellafield, will ensure the site's existing Site Ion Exchange Effluent Plant (SIXEP) facility can continue its vital work for decades to come. The newbuild SCP facility will play a vital part in Sellafield's purpose to create a clean and safe environment for future generations.

The role: We are looking for Senior CE&I Designer to undertake design delivery support to construction and commissioning activities on the SCP project. As a Senior CE&I Designer you will be highly motivated, able to work independently, and have demonstrable engineering experience, be confident in their own ability to deliver the CE&I scope on a project.

As a Senior CE&I Designer some of your responsibilities could include:

• Fully conversant in 2‑D drawing packages (ideally AutoCAD) and Aveva E&I
• Production of E&I deliverables such as loop diagrams, block cable diagrams and single line diagrams.
• Ability to update cable details and information within Aveva E&I.
• Review and production of termination details within Aveva E&I.
• Development and update control panel schematic diagrams.
• Ensure that all drawings and documentation are produced to required standards and that the work is completed to the agreed schedule.

As a Senior CE&I Designer you will already have:

• ONC/HNC Qualified in Electrical Engineering or other relevant educational background
• Ability to communicate effectively with team members and across multi‑discipline teams.
• Previous experience in the nuclear or other regulated industry.

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 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.