Principal Pre-Sales Design Engineer - AI & Modular Data Centres

About the role

A UK designer and manufacturer of prefabricated data centres and secure buildings is hiring a senior engineer to lead the technical side of its bids for high-density and AI compute facilities, including work for a Tier 1 technology company. This is a hands-on role where you own the design and the commercial, and candidates must be willing to undergo UK security vetting.

Key responsibilities

• Lead technical discovery with customers on rack densities, liquid/air heat split, resilience, footprint, security and growth.
• Design cooling for AI workloads personally: direct liquid cooling, CDUs, rear-door heat exchangers, chilled/warm water systems, with your own calculations on flow, pipe sizing and pump duties.
• Produce CAD layouts, sections and schematics, and integrate M&E into prefabricated modules from factory to site.
• Build detailed Excel pricing, challenge supplier quotes and separate base scope from options.
• Present and defend complete solutions to engineers, end customers and senior decision-makers.
• Coordinate secure-building measures and NPSA requirements with security specialists.

Required profile

• Senior mechanical/building services design experience in data centres or critical infrastructure.
• Recent, practical experience with high-density and liquid cooling.
• Proven personal CAD drawing and Excel estimating skills.
• Confidence in front of customers.
• Secure building/NPSA experience, or the ability to pick it up quickly.
• Willingness to undergo UK security vetting.

Nice to have

• Modular/prefab experience, defence or secure projects.
• Existing UK clearance, CEng, Revit/BIM.