Mechanical Design Engineer - #2630113

Black & White Engineering is expanding its Frankfurt operation and hiring at two levels of mechanical seniority — Principal Engineer and Associate Director. If you're a mechanical design specialist with a mission-critical background looking to plant roots in a high-growth European market and work on some of Europe's most exciting data centre projects, we want to hear from you. Where you land depends on your experience. We'll work that out together.

The work

You'll be designing and leading mechanical systems including cooling architectures, HVAC, chilled water, and resilience strategies for hyperscale and colocation data centres across Germany and Europe. From early concept through to commissioning, this is technically interesting, client-facing work on infrastructure that genuinely matters. If you like staying close to the technical detail as you progress, this is the place to be.

At Principal level, you'll own the mechanical scope on complex projects, mentor engineers, and act as a trusted technical advisor to major global clients.

At Associate Director level, you'll set the mechanical strategy across multiple projects, lead senior design reviews, shape business development, and build the capability of the team around you.

What you'll bring

Extensive mechanical building services experience in mission-critical environments — data centres, healthcare or high-tech manufacturing. Strong fundamentals across thermodynamics, fluid mechanics and energy modelling. Proficiency with Revit, AutoCAD, IES VE or CFD tools. Proven ability to lead projects and people in a design consultancy setting. Chartered status (CIBSE, IMechE or equivalent) preferred.

The role is based in Frankfurt, Germany but we are open to applicants relocating from across the EU. Business level English is required, and German language skills are an advantage.

Black & White Engineering is one of the fastest-growing MEP consultancies in the sector — with real progression, a global engineering community, and work that shapes critical infrastructure worldwide.