Principal Mechanical Engineer

Resourgenix - United Kingdom; Greater London; On-site; GBP 90,000 - 150,000; Full time

Job summary

Resourgenix - United Kingdom is seeking a Principal Mechanical Engineer to lead mechanical design for large-scale data centre and mission-critical projects in London. This senior role includes technical governance, design reviews and client leadership across multiple projects.

You will mentor engineers, ensure regulatory compliance and drive design excellence from concept to commissioning in collaboration with multidisciplinary teams.

Qualifications

• Must have extensive data centre and mission-critical project experience.
• Experience leading engineering teams and managing technical delivery.
• Strong client relationship and stakeholder management skills.

Responsibilities

• Lead the mechanical design and technical delivery of large-scale data centre projects.
• Oversee concept, schematic, detailed design and construction-stage deliverables.
• Review calculations, specifications and drawings for quality and compliance.
• Provide technical input and solve complex engineering challenges.
• Lead workshops, design reviews and client meetings.

Skills

Data centre design

Project leadership

Regulatory compliance

Client relationship

Mentoring

Education

Bachelor's degree in Mechanical Engineering

Chartered Engineer status

Tools

BMS integration

Job description

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.

Key Responsibilities:

Technical & Design Leadership

• 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.

Project & Client Management

• 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.

Construction & Delivery

• 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.

Business & Commercial Support

• 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.

Leadership & Development

• 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.

Technical Experience

• 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.

Must have:

• 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 within 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.

The Opportunity

This is an excellent opportunity for an experienced Principal Mechanical Engineer to join an established consultancy and take a leading role in the delivery of some of the industry's most technically demanding mission-critical projects.

The role offers significant exposure to major data centre developments, international projects, senior client stakeholders and multidisciplinary engineering teams, alongside the opportunity to shape technical standards and develop the next generation of mechanical engineering talent.

If you are an experienced Mechanical Engineer with a strong data centre or mission-critical background and are ready to take the next step in your career, we would be keen to hear from you.