Mechanical Project Engineer

Location: On site / Mallow, Co. Cork, Ireland Job Type: Permanent / Full-time Sector: Engineering Salary: €50,000 to €65,000

Due to continued growth and the award of multiple data centre utility‑water and process‑water treatment projects, our MEICA engineering team is expanding. We are seeking a Project Engineer with strong technical expertise in water treatment processes to support the delivery of critical process-water systems in hyperscale and enterprise data centres across Ireland and Europe.

In this role, you will support the design, installation, integration, and commissioning of advanced water treatment systems used in mission-critical cooling, humidification, and process applications. You will work closely with multidisciplinary teams, supply-chain partners, and major data centre operators to ensure the safe, timely, and efficient delivery of high‑reliability process-water infrastructure.

This is a varied role combining design coordination, project delivery, site engineering, and commissioning support. Depending on the project phase, it may be office‑based, site‑based, or hybrid.

• Manage and support all mechanical, electrical, and ICA aspects of process-water treatment installations within data centres.

• Interpret and work from P&IDs, technical drawings, design specifications, and functional control narratives.

• Support the design team in developing innovative solutions using modern water-treatment technologies (RO, UF, ion exchange, dosing, filtration).

• Coordinate procurement activities, including the selection and ordering of pumps, skids, valves, instruments, and control systems.

• Develop project schedules and ensure all interfaces-from design through installation to commissioning-are fully accounted for and delivered.

• Oversee the installation, integration, and performance validation of systems, including:

  • Reverse Osmosis (RO)

  • Ultrafiltration (UF)

  • Softening and demineralisation

  • Chemical dosing and disinfection

  • Polishing and high-purity systems

• Monitor process stability and water quality parameters to ensure system compliance with data centre operational requirements.

• Work alongside M&E contractors, BMS/SCADA teams, and client representatives within live or construction-stage data centre environments.

• Ensure water treatment systems integrate seamlessly with cooling towers, adiabatic coolers, chilled-water loops, and make‑up water systems.

• Support commissioning teams in FAT/SAT, functional testing, start-up, optimisation, and handover.

• Coordinate project safety requirements and liaise with the HSQE team to ensure best-in-class safety practices.

• Prepare engineering documentation, including method statements, risk assessments, O&M manuals, commissioning schedules, and progress reports.

• Manage site labour, subcontractors, and daily installation activities while ensuring all work adheres to company and client safety standards.

• Liaise and coordinate with clients, consultants, vendors, and internal project teams to ensure smooth project delivery.

• Attend progress meetings, technical reviews, and commissioning walkdowns.

• Support training and handover processes for client operations teams.