P The Senior Commissioning Engineer leads and coordinates all commissioning activities for mission-critical data centre power, electrical and mechanical systems in Madrid, ensuring full operational readiness and compliance with client, regulatory and quality standards. This includes developing execution plans, managing test phases (FAT/SAT/IST), resolving commissioning issues, and driving safe energisation and successful handover into operations. /p pb Responsibilities: /b /pulli Leading the full commissioning lifecycle of electrical mechanical systems on a large data centre project. /lili Developing and executing detailed commissioning scripts, test plans, and procedures through FAT/SAT and integrated systems testing. /lili Coordinating with construction, QA/QC, vendors/contractors and client teams to ensure systems are installed, tested and operating per design. /lili Driving issue resolution, punch lists, reporting and documentation toward successful energisation and handover. /lili Ensuring compliance with quality, safety and operational standards in a mission-critical environment. /lili Plan, witness and manage Factory Acceptance Tests (FAT) with OEMs and suppliers. /lili Lead Site Acceptance Testing (SAT) and functional performance testing onsite. /lili Drive Integrated Systems Testing (IST) to validate redundancy, failure scenarios and system resilience. /lili Ensure issues identified during testing are tracked, resolved and re-tested. /li /ul pb Requirements: /b /pullib Fluency in Spanish is a necessity /b /lili Proven track record delivering commissioning on large data centre projects. /lili Deep knowledge of mission-critical systems (MEP electrical) and commissioning documentation. /lili Strong leadership, communication, and coordination skills. /lili Comfortable working onsite in Italy with international teams. /lili8+ years commissioning experience in data centres or similar mission-critical facilities. /lili Strong understanding of UPS, switchgear, generators, MV/LV infrastructure and integrated systems testing. /lili Ability to interpret single line diagrams, control philosophies, and technical documentation. /lili Excellent coordination, reporting and stakeholder management skills. /li /ul