Principal Mechanical Design Engineer

JR United Kingdom; Watford; Hybrid; GBP 50,000 - 70,000; Full time

Job summary

A leading defense company in the UK is hiring a Principal Mechanical Design Engineer for a hybrid role in Watford. The position requires significant experience in mechanical design and offers a competitive salary with benefits including a company bonus and enhanced parental leave. Candidates must be British Citizens or dual nationals. This role involves developing solutions for complex weapons across the Product Life Cycle, collaborating with multi-disciplinary teams.

Benefits

Company Bonus up to £2,500

Pension up to 14%

Paid overtime available

Opportunity for 15 additional days of leave

Excellent on-site facilities

Qualifications

• Strong experience in mechanical design and development.
• Experience in multi-disciplinary environments.
• Knowledge of DFMEA, DFA, and DFM practices.

Responsibilities

• Develop mechanical solutions for complex weapon systems.
• Collaborate with multi-disciplinary teams across the business.
• Lead technical development through the Product Life Cycle.

Skills

Leadership in managing mechanical design packages

Excellent verbal and written communication

Proactive and professional approach

Education

Degree, HND or HNC in Mechanical Engineering

Tools

3D CAD/CAE tools

Job description

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Principal Mechanical Design Engineer, watford, hertfordshire

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Client:

The ONE Group Ltd

Location:

watford, hertfordshire, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

3

Posted:

22.08.2025

Expiry Date:

06.10.2025

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Job Description:

Principal Mechanical Design Engineer | Competitive Salary | Hybrid Role | Stevenage

Fancy taking your mechanical design expertise and using it to develop solutions for a multitude of complex weapons and weapon systems, for one of the leading defence companies in the UK?

With opportunities to work in all areas of the Product Life Cycle, collaborating with multi-disciplinary teams across the business, you will take the technical lead in developing mechanical solutions.

*Due to the nature of the work, you’ll need to be a British Citizen or a dual national with UK citizenship. Security checks will apply*

What would your new role provide you?

• Company Bonus: Up to £2,500 (depending on company performance, may vary annually)
• Pension: Up to 14% combined employer and employee contributions
• Overtime: Paid overtime available
• Flexi Leave: Opportunity to take up to 15 additional days of leave
• Flexible Working: We welcome applications from those seeking flexible arrangements
• Enhanced Parental Leave: Up to 26 weeks for maternity, adoption, and shared parental leave, with additional enhancements for paternity, neonatal, and fertility-related leave
• On-site Facilities: Excellent facilities including subsidised meals, free parking, and more

What will aid your success?

• Ideally Degree, HND or HNC qualified with significant experience in mechanical design and development
• Strong leadership in managing mechanical design packages
• Experience working in multi-disciplinary environments and understanding the challenges involved
• Knowledge of qualification and verification processes to meet technical requirements
• Proficient in robust design practices such as DFMEA, DFA, and DFM
• Excellent verbal and written communication, with strong influencing and negotiation skills
• Experience engaging and collaborating with both internal and external suppliers
• Cultural awareness and adaptability in a diverse workplace
• A proactive and professional approach, with strong prioritisation and multitasking capabilities
• Understanding of structural, thermal, or dynamic analysis is a plus
• Familiarity with 3D CAD/CAE tools (training on our preferred platforms will be provided)

For immediate consideration, please apply now.

If you have any questions, please contact Ben in The ONE Group’s Engineering & Manufacturing Division on 01733 234000.