B&

Principal Mechanical Engineer

Hiring from
Spain, United Kingdom
Work type
Hybrid
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Location: Madrid, Hybrid working

Looking to accelerate your career while delivering some of the world's most advanced data centre projects?

As a Principal Mechanical Engineer in our Madrid office, you'll join a globally connected team delivering mission-critical facilities for some of the world's leading technology and digital infrastructure organisations across Europe and beyond.

This is an opportunity to work at the forefront of data centre engineering during an exciting period of growth for Black & White Engineering. You'll collaborate with recognised industry experts across our international business, gaining exposure to diverse projects, innovative thinking, and best practices from some of the most experienced engineers in the sector.

You'll work on facilities that demand exceptional levels of resilience, efficiency, and performance, designing mechanical systems that support 24/7 operations where downtime simply isn't an option. From advanced cooling strategies and sustainable design solutions to complex HVAC and critical infrastructure systems, you'll play a key role throughout the project lifecycle, from concept and detailed design through to construction support and commissioning.

Working closely with clients, multidisciplinary teams, and technical specialists across our global offices, you'll help shape engineering solutions that power cloud computing, artificial intelligence, financial services, telecommunications, and other critical digital services relied upon by millions of people every day.

This role offers the scale, visibility, and technical challenge to accelerate your professional development, expand your influence, and create a clear pathway towards future technical and leadership opportunities.

What's In It For You

Work on Industry-Leading Data Centre Projects – Gain exposure to some of the largest and most technically challenging mission-critical developments in Europe, delivering solutions for globally recognised clients operating at hyperscale.

Technical Experience – Provide direction on mechanical design strategies, influencing decisions that shape project success.

Complex Engineering Challenges – Develop innovative solutions for cooling, resilience, sustainability, energy efficiency, and critical infrastructure within facilities where performance is paramount.

Client Engagement & Industry Visibility – Build trusted relationships with clients and stakeholders while becoming recognised as a key contributor within the data centre engineering community.

Outstanding Career Progression – Join a rapidly growing consultancy where experienced engineers have genuine opportunities to progress into technical, operational, and leadership positions.

Essential Skills

  • Degree qualified in Mechanical Engineering or Building Services Engineering.
  • Significant experience delivering mechanical building services design within data centres, mission-critical facilities, pharmaceutical, healthcare, semiconductor, or similarly complex environments.
  • Strong knowledge of HVAC systems, chilled water systems, cooling technologies, ventilation systems, heat rejection solutions, and critical mechanical infrastructure.
  • Experience undertaking engineering calculations, thermal modelling, equipment selection, and technical design reviews.
  • Proficiency with industry-standard software such as Revit, AutoCAD, IES, Hevacomp, and BIM environments.
  • Strong understanding of Irish, European, and international engineering standards and regulations.
  • Ability to lead multidisciplinary design teams and coordinate effectively with clients, contractors, and consultants.
  • Chartered Engineer (CEng) status or working towards professional accreditation.
  • Proven ability to mentor junior engineers and provide technical leadership.
  • Excellent communication and stakeholder management skills.

In addition, you will be joining a community that focuses on learning and development through regular lunch and learn sessions, investment in accredited professional courses or educational programmes. You can set the pace for your professional development, and whatever path you choose, you will receive relevant support.

About Black & White Engineering

Black & White Engineering is a multi-award-winning engineering consultancy with more than 1,300 employees across the UK, Europe, Middle East, Asia Pacific and North America.

We specialise in the full spectrum of engineering design consultancy for the data centre sector, including Mechanical, Electrical & Plumbing (MEP), Civil & Structural, Design Management, Sustainability, BIM, Power Systems and other infrastructure-related services.

Our engineering approach is grounded in practicality, technical excellence and operational efficiency. With rapid growth across regions, many colleagues have progressed from engineering roles into leadership positions — your future development is supported and recognised.

Ready to take the next step in your engineering career? Apply now and help deliver exceptional projects while shaping the future of engineering excellence at Black & White Engineering

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