Principal Mechanical Design Engineer

JR United Kingdom; Stevenage; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading defense company in Stevenage is looking for a Principal Mechanical Design Engineer to lead technical designs on complex weapons systems. The role requires strong mechanical design skills and offers a competitive salary with various benefits, including bonuses and flexible working arrangements. Candidates must be UK citizens or dual nationals. For more information, contact the Engineering Division.

Benefits

Company Bonus up to £2,500

Pension contributions up to 14%

Paid overtime available

Flexi Leave up to 15 additional days

Enhanced Parental Leave

On-site facilities including subsidised meals

Qualifications

• Significant experience in mechanical design and development.
• Experience in multi-disciplinary environments.
• Familiar with qualification and verification processes.

Responsibilities

• Lead the technical development of mechanical solutions.
• Collaborate with multi-disciplinary teams across the business.
• Support all areas of the Product Life Cycle.

Skills

Mechanical design expertise

Leadership

Communication skills

Robust design practices

Proactive approach

Education

Degree, HND or HNC in Mechanical Engineering

Tools

3D CAD/CAE tools

Job description

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Principal Mechanical Design Engineer, stevenage

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Client:

The ONE Group Ltd

Location:

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.