Senior Project Engineer – Mechanical, Data Centre Retrofit

Ethos Engineering

Senior Project Engineer – Mechanical focused on retrofit projects across mission-critical data centres at Ethos. Leading design and delivery while ensuring operational continuity and compliance with technical standards.

Posted 7/24/2026full-timeDublin • 🇮🇪 IrelandSeniorWebsite

Core Competencies

Role fit

Core Competencies

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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 DesignProject ManagementChartered Engineer StatusM&E Upgrades ExperienceBuilding Regulations Knowledge

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Mechanical EngineeringData Centre EngineeringRetrofit Design StrategiesCapacity Unlock AssessmentsOutage ManagementResilience PlanningPUE OptimisationCooling Efficiency Improvements

Soft Skills

Client LiaisonTeam MentoringQuality Assurance

Tools & Technologies

AutoCADRevit MEPBluebeamMicrosoft OfficeIESHAP

Certifications & Qualifications

Chartered Engineer StatusBachelor’s or Master’s Degree in Mechanical Engineering

Industry Keywords

Building Services EngineeringLive Data Centre EnvironmentsM&E ReplacementsLEEDBREEAMEU Energy Efficiency DirectiveCIBSEASHRAEBS StandardsEN Standards

About the role

Key responsibilities & impact

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-specific 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

What you’ll need

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.

Benefits

Comp & perks

Flexible Fridays and a 9-day fortnight working schedule — enjoy every second Friday off to maintain work–life balance.
A culture that values flexibility, learning, and teamwork , with clear progression pathways and support toward professional accreditation.
Opportunities to work alongside some of the most experienced engineers in the industry, within a forward-thinking, technology-driven consultancy.
20 days of holidays
Pension Scheme
Coverage for working travel out-of-pocket expenses
Regular training, mentoring, and further college support
Support for Chartership
A professional subscription fee paid by the company
Heavily subsidized social committee activities (5-a-side football, golf society, climbing club, and regular social events)