Principal Electrical Engineer (Data Centres and Mission Critical)

We have an exciting opportunity for a Senior / Principal Electrical Engineer to join our Data Centre & Mission Critical (MCDC) team at Hoare Lea.

Data centres are central to the modern economy and the technology that powers them is evolving rapidly. Our Mission Critical team helps clients navigate these changing requirements. At Hoare Lea you’ll gain a truly unique experience working across the full spectrum of the data-centre sector.

You’ll work across complex live plant upgrades, grey and white space in facilities, electrical design, critical engineering, and due-diligence reviews of existing facilities. Projects span mainly in the UK, but also across Ireland and Europe.

You will join a collaborative, knowledgeable and highly engaged team with a positive, supportive and flexible culture. Working alongside the Project Leader, you will engage directly with clients, develop designs and produce reports, specifications and guidance, and support testing and commissioning activities to deliver consistent, high-quality outcomes.

In this key and varied role you will:

• Own day-to-day technical delivery of electrical design services for data centre and mission-critical projects.
• Lead development of initial strategic concepts that meet the brief and regulatory requirements.
• Act as a client-facing engineer.
• Coordinate multidisciplinary inputs to deliver integrated building and campus solutions.
• Prepare and review design deliverables, specifications and technical reports.
• Provide pragmatic technical input during early-stage site appraisals, masterplanning and test-fit studies.
• Oversee testing, commissioning and handover activities.
• Support monitoring of fee expenditure, resource allocation and project delivery.
• Mentor and develop next-gen professionals.

To be successful in this role you’ll need:

• Proven experience as an Electrical Engineer delivering Mission Critical and Data Centre projects.
• Experience with Revit, BIM workflows and electrical design tools.
• Demonstrable client-facing consultancy experience.
• Strong technical judgement and a collaborative mindset.
• Experience mentoring and supporting others.

Desired specialist experience:

• Mission critical and data centre engineering across new-build, live operational upgrades, technical due diligence, feasibility studies and test fits.
• Large-scale, multi-megawatt data centre developments.
• Hyperscale, colocation and enterprise/research environments.
• Early-stage site appraisal, masterplanning and test-fit studies.
• Critical power and cooling infrastructure.
• Resilience and uptime design thinking.
• High-density and AI-ready infrastructure.
• Live operational environments and phased upgrades.
• Campus-scale developments and multidisciplinary coordination.
• Energy efficiency and sustainability in mission-critical design.
• Experience working across the UK; international experience is desirable

Hoare Lea is a human-centric and planet-conscious engineering consultancy. We offer intelligent and sustainable solutions to complex design challenges for the built environment throughout the UK and further afield.

We provide a wide range of engineering and consultancy services, including acoustics, air quality, building services (MEP), fire, lighting, security and sustainability to name but a few. Together, our highly skilled teams use technical expertise and problem-solving skills to bring buildings to life. We ensure that whatever the building, its design is outstanding, and its operations meet the needs of the communities it serves.

We are as committed to providing an environment where everyone can realise their unique potential. So, in joining Hoare Lea, you will experience a business that enriches your knowledge, supports your wellbeing, and welcomes your individuality. You’ll have the opportunity to participate in our 9-day fortnight scheme, thriving community groups, varied social and networking events, and extensive professional and technical development schemes. We also offer an extensive benefits package, including private medical cover, an electric vehicle salary sacrifice scheme, stock options, and 25 days of annual leave (increasing with service), alongside flexible and hybrid working.

Whatever your ambitions or circumstances, our aim is to enable everyone to develop their knowledge, give their best, and enjoy what they do.