Principal Mechanical Engineer

Our client is a leading engineering consultancy with a strong track record in the delivery of complex data centre and mission-critical infrastructure projects across the UK and international markets.

They are currently looking to appoint a Principal Mechanical Engineer to join their London-based team. This is a senior technical leadership position, offering the opportunity to take responsibility for the delivery of major mission-critical projects while providing technical direction, client leadership and mentorship to the wider mechanical engineering team.

The successful candidate will play a key role in delivering technically complex projects from concept and design development through to construction and commissioning, ensuring engineering quality, regulatory compliance and design excellence throughout.

• Lead the mechanical design and technical delivery of large-scale data centre and mission-critical projects.
• Take responsibility for concept, schematic, detailed design and construction-stage deliverables.
• Review and technically validate calculations, specifications, reports, drawings and technical submissions.
• Provide authoritative technical input and develop solutions to complex engineering and coordination challenges.
• Ensure designs comply with relevant UK regulations, international standards and client requirements.
• Provide technical governance and quality assurance across project deliverables.

• Lead the mechanical engineering function across multiple projects in coordination with project and senior leadership teams.
• Act as the mechanical engineering lead during technical workshops, design reviews and client meetings.
• Build and maintain strong relationships with clients and project stakeholders.
• Coordinate closely with electrical, structural, architectural, public health and specialist engineering disciplines.
• Monitor technical quality, consistency and programme delivery across project teams.

• Provide technical support throughout the construction and delivery stages of projects.
• Respond to technical queries and design clarifications.
• Attend site visits and support the resolution of design and engineering issues.
• Review commissioning inputs and support the successful implementation of design intent on site.
• Provide technical input during project close-out, commissioning and handover.

• Provide technical input into project planning and delivery strategies.
• Support the preparation of fee proposals and bid submissions.
• Contribute technical content to business development and client-facing materials.
• Demonstrate strong commercial awareness and contribute to effective project and fee management.

• Provide technical leadership, guidance and mentoring to Senior, Intermediate and Associate Engineers.
• Support the continued development of the mechanical engineering team.
• Promote technical excellence, consistency, innovation and best practice.
• Contribute to the development of engineering standards, processes and capabilities within the business.

• Data centre and mission-critical mechanical engineering design.
• Mechanical resilience and redundancy philosophies, including N+1, 2N and Concurrent Maintainability.
• HVAC system design and energy-efficient solutions, including PUE optimisation.
• Mechanical plant selection, equipment sizing and system design.
• Building Management Systems (BMS) integration.
• Multidisciplinary design coordination and technical leadership.
• UK Building Regulations, including Parts L and
  
  F.
• International standards and guidance, including ASHRAE, Uptime Institute and EN 50600.
• Tier III and Tier IV data centre environments.

• A degree in Mechanical Engineering from an accredited university.
• 10-15 years' relevant consultancy experience.
• Proven experience delivering large-scale data centre and mission-critical projects.
• Experience leading engineering teams and managing technical delivery.
• Strong client relationship and stakeholder management skills.
• Experience with in an international engineering consultancy environment.
• Chartered Engineer status through CIBSE, IMechE or equivalent professional accreditation.
• Strong understanding of UK regulatory requirements and experience working with UK clients.
• Experience with Tier III / Tier IV data centre projects.
• Strong commercial awareness and experience contributing to fee management and project delivery.

This is an excellent…