Principal mechanical design engineer

This Principal Mechanical Design Engineer role is based in London with a hybrid work pattern, offering three days on site and two days remote. You'll earn £75,000 to £85,000 per year in a permanent position. Occasional travel within the UK and Europe is part of the role.

Why this role, now

You'll join a leading organisation focused on precision motion-control assemblies. This is your chance to drive the mechanical architecture for a next-generation product line, owning the process from concept to production handover. Success here means delivering robust, manufacturable designs that meet demanding performance standards.

You'll work alongside supply chain teams and mentor a group of four engineers. The company values technical excellence and clear documentation, so your expertise will shape both the product and the team.

Your impact

Your day to day will be hands-on and influential.

• You will produce and release 3D models, detailed drawings, and GD&T schemes to ASME Y14.5 standards using SolidWorks.
• You will lead tolerance stack-up analysis, structural and modal FEA, validating design margins with ANSYS Mechanical and SolidWorks Simulation.
• You will define and execute design verification test plans, select materials and components, and collaborate with supply chain teams for manufacturability.
• You will chair design reviews, drive DFMEA activities, and mentor a team of four engineers.
• You will maintain design history files and manage tasks using jira.

What you will bring

Before you apply

• Candidates must have the right to work in the UK without sponsorship

Must have

• SolidWorks
• ASME Y14.5
• tolerance stack-up analysis
• FEA
• ANSYS Mechanical
• jira

Nice to have

• Chartered Engineer status
• vacuum-compatible design

The package

You'll earn £75,000 to £85,000 per year for this permanent role.

Hybrid work pattern with three days on site in London and two days remote.

Occasional travel within the UK and Europe is expected.

You'll have the opportunity to develop your skills and mentor others.

Sound like you? Apply now

Apply through our website to be considered for the Principal Mechanical Design Engineer role. Our expert workforce consultants will be in touch to discuss your application.

SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | Level 16, 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC387148 England and Wales