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Date Added: Wed 09/07/2025

Principal Mechanical Design Engineer

Stevenage, SG1, UK
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Company: MERITUS

Job Type: Contract, Full Time

Salary: £45 - £50/hour inside ir35

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
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