Senior Project Engineer - Mechanical, Data Centre Retrofit

• Lead the design and delivery of mechanical building services upgrades within live data centre environments, including M&E upgrades, capacity increases, technology refreshes, phased refurbishments, and lifecycle replacements.


• Develop and manage retrofit-specified design strategies, including tie-ins to live systems, redundancy planning, outage and staging strategies, and resilience design.


• Conduct or oversee technical due diligence of existing data centre facilities, including capacity unlock assessments (power, cooling, and white space).


• Prepare and review detailed design drawings, schematics, schedules, technical reports, and tender documentation.


• Manage project scope, budget, programme, and contracts - identifying and mitigating scope creep, risks, and live-environment constraints.


• Liaise directly with clients (hyperscale, colocation, and enterprise operators), contractors, and vendors to ensure project goals are achieved with zero operational disruption.


• Drive quality assurance and governance across all assigned projects, adhering to WAP/PTW protocols in live environments.


• Mentor and support the development of junior engineers and graduate staff within the retrofit workstream.


• Support business development by contributing to proposals, client presentations, and technical strategies for retrofit opportunities across EMEA.


• Champion innovation in live-environment engineering and contribute to the continuous improvement of Ethos' retrofit delivery model.


• Lead phasing strategy for live cooling and HVAC upgrades, ensuring continuity of critical mechanical infrastructure throughout delivery.

Requirements

• Bachelor's or Master's degree in Mechanical Engineering or a related discipline.


• Minimum 8 years' experience in building services engineering, with at least 3 years focused on data centre or mission-critical projects.


• Demonstrable experience working in live, operational data centre environments - including brownfield upgrades, M&E replacements, or phased refurbishments.


• Chartered Engineer status (or actively working towards Chartership) with Engineers Ireland or equivalent.


• Proven track record managing multi-million-euro MEP projects from concept to completion.


• Strong understanding of Irish and EU building regulations; knowledge of LEED/BREEAM and the EU Energy Efficiency Directive is an advantage.


• Strong expertise in mechanical systems design for live data centre environments, including chilled water plant, CRAC/CRAH upgrades, air handling units, in-row cooling, and fire suppression systems.


• Experience delivering M&E upgrades within operational facilities - including tie-ins to live plant, outage management, and resilience planning.


• Proficient in AutoCAD, Revit MEP, Bluebeam, and Microsoft Office; working knowledge of IES, HAP, or similar mechanical analysis tools is advantageous.


• Strong knowledge of CIBSE, ASHRAE, BS, IS, and EN standards applied in retrofit and live-environment contexts.


• Understanding of PUE optimisation and cooling efficiency improvements to meet EU Energy Efficiency Directive targets and client ESG requirements.


• Familiarity with commissioning and integration of mechanical systems within live, mission-critical facilities.

Core Competencies

Demonstrates expertise in mechanical systems design and project management within live data centre environments, focusing on M&E upgrades, resilience planning, and compliance with building regulations. Proven ability to lead teams, mentor junior engineers, and drive innovation in retrofit delivery models.

Highest-signal resume keywords

• Mechanical Systems Design


• Project Management


• Chartered Engineer Status


• M&E Upgrades Experience


• Building Regulations Knowledge

ATS Optimization Keywords
Hard Skills

• Mechanical Engineering


• Data Centre Engineering


• Retrofit Design Strategies


• Capacity Unlock Assessments


• Outage Management


• Resilience Planning


• PUE Optimisation


• Cooling Efficiency Improvements

Soft Skills

• Client Liaison


• Team Mentoring


• Quality Assurance

Certifications & Qualifications

• Chartered Engineer Status


• Bachelor's or Master's Degree in Mechanical Engineering

Industry Keywords

• Building Services Engineering


• Live Data Centre Environments


• M&E Replacements


• LEED


• BREEAM


• EU Energy Efficiency Directive


• CIBSE


• ASHRAE


• BS Standards


• EN Standards

Tools & Technologies

• AutoCAD


• Revit MEP


• Bluebeam


• Microsoft Office


• IES


• HAP