Senior / Principal Mechanical Design Engineer

Make UK; London; Hybrid; GBP 50,000 - 70,000; Full time

Job summary

An advanced engineering firm in London is looking for a Senior Mechanical Design Engineer to lead the design and development of mechanical systems for defense products. You'll be responsible for full product lifecycle management, including documentation and testing. The ideal candidate has a degree in Mechanical Engineering, CAD expertise, and a commitment to mentoring junior engineers. The position offers a competitive salary and flexible working options.

Benefits

5% annual performance bonus

Flexible working arrangements

9-day fortnight

25 days annual leave plus bank holidays

Life assurance (4x salary)

Pension scheme with 7.5% employer contributions

Flexible benefits platform

Relocation support

Qualifications

• Proven track record delivering mechanical solutions across the full engineering lifecycle.
• Strong proficiency with CAD and PLM tools.
• Eligible for UK Security Clearance (SC).

Responsibilities

• Define mechanical architecture and ensure validation.
• Develop robust mechanical solutions using advanced engineering tools.
• Produce and review technical documentation for projects.
• Design mechanical test solutions to verify performance.
• Present technical solutions and lead project deliverables.

Skills

Mechanical solutions delivery

Risk management

Mentoring junior engineers

Technical documentation production

Education

Degree in Mechanical Engineering or related discipline

Tools

Creo

Autodesk Inventor

Windchill

IFS

Job description

Senior / Principal Mechanical Design Engineer

Location: London

Job Type: Permanent

We are seeking an experienced Senior Mechanical Design Engineer to take ownership of the design, development, testing, and documentation of mechanical assemblies for advanced defence products. You will play a pivotal role throughout the full product lifecycle, from concept and prototyping through to production and in-service support.

Responsibilities

• Define mechanical architecture, systems, and sub-systems, ensuring full validation and verification.
• Develop and deliver robust mechanical solutions for complex, multi-disciplinary systems using advanced engineering toolsets.
• Produce and review technical documentation including design reports, data packs, analysis, and procedures.
• Design and implement mechanical test solutions to verify hardware performance.
• Support integration, verification, and acceptance testing, providing evidence to customers and stakeholders.
• Present technical solutions and risk assessments to internal teams and external clients.
• Lead technical work packages and contribute to project delivery.
• Provide in-service and production support as required.
• Mentor and coach junior engineers, supporting their technical development.
• Drive continuous improvement across mechanical design processes, tools, and standards.

Requirements

• Degree (or equivalent) in Mechanical Engineering or related discipline.
• Proven track record delivering mechanical solutions across the full engineering lifecycle.
• Strong proficiency with CAD and PLM tools (e.g., Creo, Autodesk Inventor, Windchill, IFS).
• Solid understanding of mechanical engineering principles including material selection, assembly methods, and manufacturing processes.
• Experience in complex, multi-disciplinary engineering environments.
• Ability to manage risks, balance technical trade-offs, and deliver on time to specification.
• Eligible for UK Security Clearance (SC).

Benefits

• 5% annual performance bonus
• Flexible working arrangements, including hybrid options
• 9-day fortnight (every other Friday off)
• 25 days annual leave plus bank holidays, with ability to buy/sell up to 5 days
• Life assurance (4x salary)
• Pension scheme with up to 7.5% employer contributions after 5 years
• Flexible benefits platform (retail discounts, health screening, and more)
• Relocation support (case by case, subject to HMRC rules)

Apply for this position if it matches your skills and interests.