Senior Electrical Project Engineer (Data Centres)

About the role

This is a key role within our Dublin Core Team, acting as a technical pillar for our electrical design delivery. You will report and work directly with the founding Electrical Director, offering unrivalled mentorship and genuine influence over project direction. You will be a hands-on engineer, taking ownership of the design and delivery of electrical systems — LV/MV power distribution, UPS, standby generation, and switchgear — across a wide range of data centre projects, from fast-paced data hall fit-outs and live-environment retrofits to large-scale new builds for colocation and hyperscale clients.

This role suits a technically-driven engineer who thrives on solving complex problems and wants to take a significant step in their career. You will be a foundational member of the team, helping to mentor our Intermediate and Graduate engineers and shaping the technical standards of a new, ambitious consultancy.

Location

Dublin, Ireland (Hybrid)

Reports to: Associate Electrical Engineer / Electrical Director.

Key Responsibilities

1) Design & Delivery

• Lead the design and delivery of electrical building services, including LV/MV power distribution, UPS systems, standby generation, busbar systems, and life safety systems, across new-build, fit-out, and retrofit data centre projects.

2) Technical Production

• Prepare and review technical specifications, calculations, single-line diagrams, schematics, and tender documentation.
• Undertake or oversee power system studies, including load flow, short circuit, selectivity, and coordination analysis.

3) Quality Assurance

• Act as a key reviewer, checking calculations, drawings, and reports produced by junior engineers and the remote Flex Team to ensure technical excellence.

4) Project & Commercial Management

• Manage project scope, budget, programme, and contracts — identifying and mitigating scope creep and delivery risks; report regularly to the Associate/Director on project performance.

5) Live Environment & Retrofit Delivery

• Develop retrofit-specific design strategies for live, operational data centre environments, including tie-ins to live systems, outage and staging strategies, and resilience design, adhering to WAP/PTW protocols.

6) Client & Contractor Liaison

• Work directly with clients (hyperscale, colocation, and enterprise operators), consultants, and contractors, providing technical advice and representing ZeroOne in project and site meetings.

7) Mentorship

• Mentor and support the development of Intermediate and Graduate engineers, encouraging knowledge sharing and professional growth.

About You

• Bachelor's or Master's degree in Electrical Engineering or a related discipline.
• Minimum 8 years' experience in electrical building services engineering, ideally within a multidisciplinary consultancy environment, with at least 3 years focused on data centre or mission-critical projects.
• Proven track record leading multi-million-euro electrical design packages from concept through to delivery.
• Chartered Engineer status (or actively working towards Chartership) with Engineers Ireland, CIBSE, or equivalent.
• Strong knowledge of electrical systems design, including LV/MV power distribution, UPS systems, standby generation, busbar systems, lighting, fire detection, earthing and lightning protection, and ELV systems.
• Experience undertaking MV power system studies, including load flow, short circuit, selectivity, and coordination analysis.
• Strong working knowledge of AutoCAD, Revit MEP, and Bluebeam; proficiency with ETAP, Dialux, or Amtech for calculations.
• Excellent understanding of IEC, CIBSE, BS, IS, and EN standards.
• Applicants must have the legal right to live and work in the European Union and be able to provide evidence of their work authorization if requested.

Preferred

• Demonstrable experience working in live, operational data centre environments, including brownfield upgrades or phased refurbishments.
• Familiarity with BMS/EPMS integration and smart building systems.
• Experience working on projects across the EMEA region.

Certifications

• Chartered Engineer (CEng) with Engineers Ireland, CIBSE, or equivalent — held, or actively working towards.

Package & Benefits

• Competitive salary, reflective of experience and market benchmarks
• Pension contribution
• Hybrid working model
• Direct mentorship from founding Directors
• Structured support toward relevant professional certification (e.g., Chartered Engineer with Engineers Ireland / CIBSE)
• Travel and expenses covered for client-site visits across Europe

About ZeroOne

ZeroOne is a specialist MEP Design Solutions Company focused exclusively on the European Data Centre sector. Founded by industry leaders who have collectively delivered over 2GW of Data Centre capacity across the EMEA region, we combine deep technical expertise with an agile, client-focused approach. We are headquartered in Dublin and have a simple mission: to be the benchmark and most trusted name in MEP Design Solutions in the European Data Centre industry by delivering exceptional, sustainable, and highly efficient designs.

Our innovative Core & Flex delivery model combines a highly experienced Ireland-based core team with a scalable network of specialist engineering professionals across the industry. This approach allows us to deliver technical excellence, remain responsive to client needs, and support some of the industry's most demanding projects.

At ZeroOne, we are building a culture centred on Technical Excellence, Agility, Client Partnership, and One Team Collaboration, creating an environment where talented engineers can make a real impact.

Why Join ZeroOne?

1. Learn from Industry Leaders

Work directly with founding directors who have delivered some of the largest and most complex data centre projects across Europe. Gain hands-on mentorship and accelerate your professional development.

2. Shape the Future of a Growing Business

Join at an exciting stage of our journey and play a meaningful role in building a next-generation consultancy. Your ideas, expertise, and contributions will directly influence our success.

3. Work on Market-Leading Data Centre Projects

Support the delivery of cutting-edge projects for major colocation and hyperscale clients across Europe, helping to shape the digital infrastructure of tomorrow.

4. Enjoy Genuine Flexibility with Competitive Remuneration

Our business is designed around modern working practices, offering a flexible hybrid model that promotes autonomy, collaboration, and work-life balance.

5. Be Part of a High-Performance, People-First Culture

Join a team that values trust, accountability, inclusion, and teamwork. We celebrate individual contributions, support personal growth, and succeed together as one team.