Senior Mechanical Design Engineer (Data Centres) - London | Hybrid

Senior Mechanical Design Engineer – Data Centres

Location: London, UK (Hybrid Working)

Salary: Up to £75,000 + Benefits

Visa Sponsorship: Available if required

Job Type: Permanent

Help Design the Next Generation of Data Centres

An internationally recognised engineering and design consultancy is seeking a Senior Mechanical Design Engineer to join its growing Data Centres team in London.

This is an exciting opportunity to work on mission-critical infrastructure projects, supporting the design and delivery of high-performance data centre facilities that power global digital services. You will contribute to the development of innovative, energy-efficient mechanical systems that support resilient and sustainable digital infrastructure.

As a Senior Mechanical Design Engineer, you will play a key role in delivering HVAC and mechanical building services designs for hyperscale and colocation data centre environments, collaborating with multidisciplinary engineering teams on complex global projects.

Key Responsibilities

• Lead the mechanical design of building services systems for data centre and mission-critical facilities.
• Design and develop HVAC, cooling, and thermal management systems for high-performance infrastructure environments.
• Produce engineering calculations, design documentation, drawings, and technical specifications.
• Collaborate with multidisciplinary teams including electrical engineers, architects, BIM specialists, and sustainability consultants.
• Support project delivery ensuring designs meet performance, reliability, and efficiency standards.
• Mentor junior engineers and contribute to technical development within the team.
• Engage with clients, contractors, and stakeholders to deliver innovative engineering solutions.
• Ensure compliance with CIBSE standards, UK regulations, and data centre performance requirements.

Required Skills & Experience

• Degree in Mechanical Engineering, Building Services Engineering, or a related discipline.
• 6–10+ years experience in mechanical design engineering within building services or consulting engineering.
• Strong experience designing HVAC systems, cooling solutions, and mechanical plant.
• Experience producing engineering calculations, technical reports, and specifications.
• Proficiency with BIM tools such as Revit MEP.
• Strong stakeholder communication and collaboration skills.
• Ability to manage design deliverables across complex engineering projects.

Desirable Experience

• Experience working on data centre or mission-critical infrastructure projects (preferred but not required).
• Knowledge of data centre cooling strategies such as chilled water systems, CRAH/CRAC units, or liquid cooling.
• Experience delivering energy-efficient or low-carbon engineering solutions.
• Chartered Engineer (CEng) status or working towards chartership with CIBSE or IMechE.

What’s On Offer

• Salary up to £75,000
• Visa sponsorship available for eligible candidates
• Hybrid and flexible working options
• Opportunity to work on large-scale global data centre projects
• Structured career development and chartership support
• Collaborative, multidisciplinary engineering environment