Principal Mechanical Engineer

Principal Mechanical Engineer | Portsmouth, United Kingdom | Hybrid | £54,500

We're hiring on behalf of a globally recognised leader in defence, aerospace, and security, committed to pioneering progress and protecting what matters most. This organisation offers a career with purpose, where you'll contribute to advanced, technology-led solutions and shape a safer future for all.

The Role

• Provide comprehensive mechanical engineering support across a wide range of platform systems, including fluid, hydraulic, HVAC, firefighting, propulsion, and mechanical drive systems.
• Ensure design integrity, investigate system impacts, and deliver safe, well-integrated engineering solutions across diverse naval platforms.
• Collaborate with stakeholders such as MOD teams, overseas navies, OEMs, and project groups to capture and guide system requirements.
• Lead structured analysis, maintain configuration control, and prepare authoritative safety evidence.
• Act as a primary technical contact while supporting wider organisational priorities.
• Provide effective line management for a team of engineers, ensuring clear leadership, performance oversight, and professional development.

What You'll Need

• Broad knowledge of complex platform systems across UK and international markets.
• Good understanding of applicable industry standards and experience within relevant governance and assurance frameworks.
• Ability to apply mechanical engineering knowledge quickly and confidently to a wide range of platform systems, sub-systems, and equipment.
• Experienced professional engineer at CEng level or equivalent capability.
• Experience in providing technical leadership, governance, and specialist expertise.

What's On Offer

• A career with purpose and limitless possibilities in a dynamic industry.
• Lifelong learning opportunities and a supportive culture.
• Recognition for contributions and tailored rewards.
• Support for financial and personal wellbeing, promoting a balanced lifestyle.

Apply via Haystack today!