Senior Mechanical Designer

Amentum; Aston-on-Trent; Hybrid; GBP 45,000 - 65,000; Full time

Benefits offered by this job

Free medical cover

Digital GP service

Enhanced parental leave pay

Employee assistance program

Volunteer & charitable donations

Job summary

Amentum is seeking a Senior Mechanical Designer in the UK to develop detailed 3D models and multi-disciplinary assemblies using Autodesk Inventor. You will translate requirements into practical, fabrication-ready solutions and lead design coordination across disciplines.

Based at our Energy offices with hybrid working options, you will mentor junior designers and help drive modular project delivery for nuclear-related projects in support of Net Zero goals.

Qualifications

• Practical Autodesk Inventor experience and strong grasp of engineering design and fabrication processes.
• Experience working across multi-disciplinary modular teams and environments.
• Willingness to mentor junior designers and coordinate design activities for senior roles.

Responsibilities

• Develop detailed 3D models and engineering designs using Autodesk Inventor.
• Produce and manage complex assemblies, weldments and equipment layouts.
• Create piping layouts, equipment arrangements and supporting structural designs.
• Produce fabrication and installation drawings with high quality standards.
• Coordinate design data and model properties across disciplines.

Skills

Multidisciplinary design

Team collaboration

Technical leadership

Tools

Autodesk Inventor

Navisworks

Autodesk Vault

Plant 3D

iLogic/parametric modelling

Job description

About the role

We are seeking an experienced Senior Mechanical Designer with strong Autodesk Inventor capability to support the development of complex, multi-disciplinary engineering designs. Amentum is entering an exciting phase of opportunity supporting new small and advanced modular reactor developers internationally. Our work is varied, covering nuclear projects (Licensing, New Build, Generation, Life Extension, and Defueling). We're looking for a driven individual who embraces collaboration and diversity, and who shares our vision to create a secure and vibrant future by continuously reinventing, realising breakthroughs and taking on challenges with courage. Our goal is to support development of new nuclear technologies and to keep existing power stations operating safely, contributing to the UK's Net Zero carbon target.

Responsibilities

• Develop detailed 3D models and engineering designs using Autodesk Inventor
• Produce and manage complex assemblies, fabricated structures, weldments and equipment arrangements
• Develop piping layouts, equipment arrangements and supporting structural/framing designs
• Produce high-quality manufacturing, fabrication and installation drawings
• Interpret engineering requirements, specifications, P&IDs and other technical information and translate these into practical design solutions
• Develop modular designs incorporating : Mechanical equipment and systems, piping and associated supports, electrical equipment and assemblies and Control and Instrumentation (C&I) equipment
• Apply Design for Manufacture (DfM) and Design for Installation (DfI) principles to optimise designs for fabrication, assembly, transport and installation
• Work closely with engineering disciplines to integrate designs and resolve physical and technical interfaces
• Undertake design reviews and model coordination using Navisworks, including clash detection and resolution
• Maintain accurate engineering model properties, component information and design data
• Manage CAD files, revisions and engineering information using Autodesk Vault and associated configuration-management processes
• Support engineering change and file-reference management using Inventor Design Assistant or equivalent tools

Ensure designs take appropriate account of fabrication methods, tolerances, welding requirements and practical constructability. This is an excellent opportunity for someone with a background in engineering design, CAD, BIM, modularisation and/or digital engineering who has hands-on experience using Autodesk Inventor and wants to support modular project delivery. You will develop and coordinate accurate 3D models, assemblies, fabrication drawings, bills of materials and installation information for integrated mechanical, electrical, piping and instrumentation modules.

Ideal candidate

The ideal candidate will have practical Autodesk Inventor experience, a good understanding of engineering design and fabrication processes, and the ability to work confidently across multi-disciplinary modular engineering teams. Experience with modularisation, Autodesk Vault, iLogic/parametric modelling, Navisworks, Plant 3D, common data environments or digital handover would be advantageous. For more senior candidates, there will also be opportunities to coordinate design activities and provide technical leadership and mentoring to junior designers. People are at the heart of everything we do central to the success of the role will be your people skills, building effective relationships and interacting with multiple internal and external stakeholders in multiple locations. You'll also work closely with colleagues to support activities that offer the best service to the client. Through your interactions, you'll be able to gather useful intelligence on client needs and work with the team to deliver innovative solutions. You'll utilise your strong communication and engagement skills to achieve client, people and business outcomes, working with your team and peers that are based in different locations across the UK. We are continuously evolving and growing the business, so there's plenty of opportunity to evolve and grow your skills and career too.

Working location and flexibility

This role will be based at one of our Energy offices ( Newcastle, Warrington ). We put flexibility at the heart of what we do and we’re happy to consider flexible working patterns. In addition, we are happy to discuss hybrid, part‑time and flexible working hours, patterns and locations to suit you and our business.

Our values

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.

Benefits

• 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.
• Free membership of employee assistance and parental programmes.
• Reimbursement towards relevant professional development and memberships.
• We also give back to our communities through our Collectively program which incorporates matched-funding, paid volunteering time and charitable donations.