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Principal Mechanical Design Engineer

MERITUS Talent are working with one of Europe's leading defence systems manufacturers for the recruitment of a Principal Mechanical Design Engineer to join their Stevenage office on a 12 Month contract basis. The rate on offer is £50 per hour INSIDE IR35, and requires the candidate to be onsite full-time. Before starting the role, the candidate must undergo and attain SC security clearance.



Job Title: Principal Mechanical Design Engineer

Location: Stevenage (on-site)

Rate: £50 per hour (via umbrella)

Contract: 12 Months

Security Clearance: Must be eligible to obtain UK SC clearance



A leading defence engineering organisation is seeking a Principal Mechanical Design Engineer to join their team in Stevenage. In this role, you'll be working on the mechanical design of complex systems, contributing to high-profile defence projects within a multi-disciplinary engineering environment.



What you'll be doing:



Creating and developing 3D designs of components and assemblies using Creo



Supporting the transition from design to manufacturing, resolving technical queries as needed



Assisting in functional and environmental testing to ensure designs meet performance requirements



Liaising with suppliers and internal purchasing teams to address design or build challenges



Planning and managing your own tasks in line with project deadlines and reporting requirements



Reviewing and refining technical requirements to reduce cost, complexity and lead time



Key skills and experience:



Proficient in Creo 3D CAD software



Strong understanding of mechanical engineering principles and manufacturing processes



Experience in one or more of the following:



Tolerance analysis



Structural design and environmental testing



Material selection



FMEA



Mass property calculations



Gasket sealing and design for manufacture/assembly



Working with Defence Standards



Product lifecycle management



Comfortable working in a cross-functional team and participating in design reviews



A broad appreciation of other engineering disciplines (e.g. systems, electronics) is a plus



This is a great opportunity to be part of a highly skilled engineering team, working on critical systems in a challenging but rewarding environment.



To apply, please send your CV and availability

Principal Mechanical Design Engineer

Stevenage, UK
Full time

Published on 07/09/2025

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