Civils (3D) Designer

Civils (3D) Designer

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.

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 Project You will be specifically working on the Enabling works package to support the development of a treatment facility for SIXEP and SCP secondary waste.

The Role

As a Civil (3D) Designer, works will include service diversions; development of service and drainage schemes; earthworks; vehicle tracking; road layouts; developing new schemes connecting into existing infrastructure; producing foundation drawings and details.

Other responsibilities could include:

• Model Management- Create and maintain complex 3D surfaces using points, breaklines, and boundaries.
• Corridor Design- Develop intelligent 3D roadway models using alignments, profiles, and custom assemblies.
• BIM Workflow- Implement and manage Data Shortcuts to maintain a "single source of truth" across multi-disciplinary project teams.
• Automated Production- Set up and manage Sheet Set Manager and Plan Production tools to generate high-volume construction sets (Plan/Profile/Cross-Section) with minimal manual editing.
• Analysis & Reporting- Perform earthwork volume calculations, interference checks (clash detection), and pipe network analysis.
• Attending regular model reviews/space management meetings and be able to represent CS&A and present the model.
• Working closely with CS&A Engineers/Architects and modelers from other disciplines to co-ordinate the development of the model.
• Understanding and fulfilling the Designer role under the CDM Regulations.

As a Civils (3D) Designer you will already have:

• Civil / structural engineering MEng or equivalent
• Experience using Revit and Autodesk Design Review to produce and review GA and detail drawings in a Building Information Modelling (BIM) environment.
• Experience using British and European Standards and Building Regulations, and the methodologies required when detailing elements.
• Experience in detailing below ground drainage and services; groundworks; steelwork and reinforced concrete.
• Experience working in an industrial/heavy civils environment
• Experience of using Autodesk Civil 3D; Revit; Autodesk Design Review and Vehicle Tracking.

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.