Mechanical Designer

Amentum; Newcastle upon Tyne; Hybrid; GBP 55,000 - 85,000; Full time

Benefits offered by this job

Hybrid working

Free medical cover (UK)

Collectively volunteering & donations

Job summary

Amentum seeks an experienced Senior Mechanical Designer to develop complex 3D models and assemblies using Autodesk Inventor for modular nuclear projects. You will coordinate mechanical, electrical, piping and instrumentation modules across multidisciplinary teams, delivering fabrication drawings and installation guidance from concept through to handover.

The role requires hands-on CAD experience, BIM/Modular workflows, and a proactive approach to design for manufacture and installation.

Qualifications

• Experience using Autodesk Inventor for 3D CAD and assemblies.
• Knowledge of modular engineering and BIM workflows.
• Experience with multi-disciplinary teams in nuclear/energy projects.
• Ability to interpret P&IDs and translate to layouts.
• Experience with design for manufacturing and installation.

Responsibilities

• Develop detailed 3D models and engineering designs using Autodesk Inventor.
• Produce and manage complex assemblies, welded structures and equipment arrangements.
• Develop piping layouts, equipment arrangements and supporting structural/framing designs.
• Produce high-quality manufacturing, fabrication and installation drawings.
• Interpret engineering requirements and translate into practical design solutions.
• Coordinate modular designs across mechanical, electrical, piping and C&I modules.
• Apply DfM/DFI principles to optimise fabrication, assembly and installation.

Skills

Autodesk Inventor

3D Modelling

Navisworks

Piping Design

Fabricated Structures

DfM/DFI

Plant 3D

Multidisciplinary teamwork

Tools

Autodesk Vault

Plant 3D

iLogic

Job description

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.

Qualifications and experience

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-discipline 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're continuously evolving and growing the business, so there's plenty of opportunity to evolve and grow your skills and career too. 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. We put flexibility at the heart of what we do We are seeking an experienced Senior Mechanical Designer with strong Autodesk Inventor capability to support the development of complex, multi-disciplinary engineering designs. The role will focus on the development of modular mechanical, electrical, piping, control and instrumentation systems from concept through detailed design, manufacture and installation. The successful candidate will combine strong 3D CAD capability with practical knowledge of fabrication, piping, structural framing and design for manufacture and installation. For more senior candidates, there will also be opportunities to coordinate design activities and provide technical leadership and mentoring to junior designers.

Key skills

• Intermediate to advanced capability in Autodesk Inventor, including: 3D part modelling, cComplex assemblies, weldments, structural/frame modelling and fabrication and manufacturing drawings
• Strong mechanical design and detailing experience within an engineering environment
• Experience of piping design and layout development
• Experience designing fabricated structures, equipment frames or similar assemblies
• Good understanding of manufacturing and fabrication methods, including welding and assembly
• Ability to interpret and produce engineering drawings and technical documentation
• Ability to interpret P&IDs and translate system requirements into physical arrangements
• Experience applying practical DfM, DfI and constructability principles
• Experience working within multi-disciplinary engineering teams

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 and perks

• 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.
• We also give back to our communities through our Collectively program which incorporates matched‑funding, paid volunteering time and charitable donations.
• Work‑life balance and flexibility are 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.