MV Commissioning Engineer | Dublin

Evergreen Talent Group; Dublin; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Technical training

Career development support

Competitive benefits package

Job summary

Evergreen Talent Group is seeking an experienced MV Commissioning Engineer to support testing, energisation and handover of MV electrical systems on a major data centre project in Dublin. You will coordinate across MV switchgear, transformers, protection relays and associated infrastructure under the guidance of the Commissioning Manager.

The role involves Level 1-5 data centre commissioning, safety-focused energisation, and collaboration with vendors, utility providers and client

Qualifications

• Degree or equivalent in Electrical Engineering; MV commissioning experience.
• Experience with MV switchgear, transformers, protection relays and MV cabling.
• Experience with safe switching, LO/TO and permit-to-work.
• Ability to read single-line diagrams and protection studies.
• Eligibility to work in Ireland.

Responsibilities

• Develop and execute MV testing and commissioning procedures and documentation.
• Coordinate MV switchgear, transformers and distribution systems commissioning.
• Manage insulation-resistance, continuity, phasing and cable testing.
• Coordinate testing with vendors, utilities and client representatives.
• Record results and drive resolution of any faults or anomalies.

Skills

MV testing

Protection coordination

Stakeholder management

Communication skills

Fault-finding

Education

Electrical Engineering degree

HNC/HND in Electrical Engineering

Tools

Omicron

Megger

Doble

Job description

MV Commissioning Engineer - Data Centre | Dublin

• Join a leading Tier 1 Contractor delivering a major Dublin data centre.
• Work with technically advanced MV power-distribution and protection systems.
• Gain extensive Level 1-5 data centre commissioning experience.
• Participate in controlled energisation and integrated systems testing.
• Work alongside experienced electrical and commissioning specialists.
• Progress towards Lead Commissioning Engineer or Commissioning Manager.
• Receive a competitive salary and comprehensive benefits package.
• Access specialist technical training and professional-development support.
• Benefit from a strong pipeline of Irish and European data centre projects.

MV Commissioning Engineer Job Overview

A leading Tier 1 Contractor is seeking an experienced MV Commissioning Engineer to support the testing, energisation and handover of medium-voltage electrical systems on a major data centre development in Dublin.

The MV Commissioning Engineer will coordinate and execute commissioning activities across MV switchgear, transformers, protection relays, ring-main units, MV cabling, control systems and associated electrical infrastructure. Working closely with the Commissioning Manager, Electrical Project Manager, specialist vendors, utility providers and client representatives, you will ensure that MV systems are tested, documented and safely energised in accordance with project procedures, approved commissioning scripts and manufacturer requirements.

This position would suit an experienced MV Commissioning Engineer, Electrical Commissioning Engineer, Protection Engineer or Authorised Person with data centre, utilities, power generation or mission-critical project experience.

Key Responsibilities

MV Testing and Commissioning

• Develop and execute MV testing and commissioning procedures.
• Commission MV switchgear, transformers, ring-main units and distribution systems.
• Carry out insulation-resistance, continuity, phasing and cable-integrity testing.
• Coordinate VLF, withstand or other specified MV cable tests.
• Test current transformers, voltage transformers and metering systems.
• Perform primary and secondary injection testing.
• Configure and test protection relays in accordance with approved settings.
• Verify circuit-breaker operation, interlocks and control circuits.
• Test trip circuits, alarms, indications and remote-control functions.
• Confirm correct phase rotation and system configuration before energisation.
• Coordinate specialist testing contractors and equipment vendors.
• Record test results and ensure failures are investigated and resolved.

Commissioning Planning and Preparation

• Review single-line diagrams, protection studies and commissioning specifications.
• Develop commissioning plans, scripts, test sheets and inspection records.
• Ensure commissioning requirements are incorporated into the construction programme.
• Review system boundaries and establish an appropriate energisation sequence.
• Confirm prerequisite construction and quality activities are complete.
• Coordinate vendor attendance and specialist test-equipment requirements.
• Participate in commissioning readiness and system-completion reviews.
• Identify commissioning risks, constraints and interface requirements.
• Maintain short-term commissioning and energisation look-ahead programmes.
• Verify that calibrated test equipment and approved procedures are available.

Energisation and Electrical Safety

• Support the development and implementation of safe energisation plans.
• Ensure switching schedules are reviewed and approved before use.
• Coordinate electrical isolations, lockout/tagout and permit-to-work procedures.
• Verify that energisation dossiers are complete before systems are made live.
• Establish controlled access and exclusion zones around energised equipment.
• Confirm earthing arrangements and safety devices are operational.
• Participate in switching and energisation activities within the limits of authorisation.
• Maintain accurate records of system status, isolations and switching operations.
• Stop or escape activities where conditions are unsafe or prerequisites are incomplete.
• Promote a strong electrical-safety culture across all commissioning activities.

Protection, Controls and Systems Integration

• Review protection coordination, relay settings and discrimination requirements.
• Verify operation of overcurrent, earth-fault, differential and other protection functions.
• Test intertrips, permissives, interlocks and emergency shutdown sequences.
• Coordinate MV interfaces with generators, UPS systems and LV distribution.
• Verify communication between protection relays and monitoring systems.
• Coordinate interfaces with EPMS, SCADA, BMS and controls platforms.
• Test alarms, status signals and remote switching commands.
• Support black-building, loss-of-mains and resilience testing where required.
• Assist with load-bank testing and integrated power-system testing.
• Investigate protection, control and communication faults.

Data Centre Commissioning and IST

• Support Level 1-5 data centre commissioning activities.
• Review factory and site acceptance test documentation.
• Participate in system walkdowns and commissioning readiness inspections.
• Coordinate MV commissioning with downstream LV and mechanical systems.
• Support generator, UPS and standby-power integration testing.
• Participate in integrated systems testing and client demonstrations.
• Verify system operation under normal, emergency and failure scenarios.
• Support cause-and-effect and sequence-of-operation testing.
• Record commissioning defects and monitor corrective actions.
• Ensure outstanding works are closed before final system acceptance.

Quality and Documentation

• Ensure testing complies with approved drawings, specifications and standards.
• Maintain complete and traceable commissioning records.
• Review vendor test certificates and factory acceptance test reports.
• Compile energisation packs, test reports and system turnover documentation.
• Ensure equipment serial numbers and protection settings are accurately recorded.
• Manage commissioning observations, defects and non-conformance reports.
• Review red-line drawings and confirm final system configurations.
• Support preparation of as-built drawings and operation and maintenance manuals.
• Maintain accurate test-equipment calibration records.
• Assist with client, consultant and quality audits.
• Ensure turnover packs are complete and ready for client acceptance.

Technical and Stakeholder Coordination

• Work closely with the Commissioning Manager and Electrical Project Manager.
• Coordinate with construction, quality, design, planning and EHS teams.
• Liaise with specialist vendors, utility providers and commissioning authorities.
• Attend commissioning, energisation and progress meetings.
• Provide clear technical updates and commissioning-status reports.
• Review technical queries and support timely issue resolution.
• Assist junior engineers and technicians during testing activities.
• Communicate system status and commissioning restrictions to project stakeholders.
• Support client witnessing and acceptance of completed tests.
• Maintain professional working relationships with all project participants.

Essential Qualifications and Experience

• Degree, HNC, HND, electrical trade qualification or equivalent experience in Electrical Engineering.
• Previous experience commissioning MV electrical systems.
• Strong knowledge of MV switchgear, transformers, protection relays and MV cabling.
• Experience carrying out primary and secondary injection testing.
• Understanding of protection settings, discrimination and electrical interlocking.
• Experience with safe switching, isolation, LOTO and permit-to-work procedures.
• Ability to read single-line diagrams, schematics and protection studies.
• Experience preparing test sheets, energisation packs and commissioning records.
• Strong fault-finding and technical problem-solving skills.
• Good communication and stakeholder-management abilities.
• Willingness to work in a site-based commissioning environment in Dublin.
• Eligibility to work in Ireland.

Desirable Experience

• Previous experience commissioning hyperscale data centres.
• Experience working for a Tier 1 Contractor or leading M&E contractor.
• Knowledge of Level 1-5 data centre commissioning.
• Authorised Person or Senior Authorised Person experience.
• Experience with Omicron, Megger, Doble or equivalent test equipment.
• Knowledge of EPMS, SCADA, BMS and protection-communication protocols.
• Experience with generators, UPS systems and integrated power testing.
• Familiarity with IEC standards and Irish electrical requirements.
• Experience witnessing factory acceptance and site acceptance testing.
• Valid Safe Pass and relevant electrical-safety certification.

This position would suit an experienced MV Commissioning Engineer, Electrical Commissioning Engineer, Protection Engineer, Commissioning Technician or Authorised Person with experience in data centres, utilities, power generation, substations or other mission-critical environments.

The successful candidate will be based on a major data centre development in Dublin, with potential future opportunities across the contractor's wider Irish and European project portfolio.