Mechanical Data Center Operations Technician

About Nebius: Nebius is leading a new era in cloud infrastructure for the global AI economy. We are building a full-stack AI cloud platform that supports developers and enterprises from data and model training through to production deployment, without the cost and complexity of building large in-house AI/ML infrastructure. Built by engineers, for engineers. From large-scale GPU orchestration to inference optimization, we own the hard problems across compute, storage, networking and applied AI. Listed on Nasdaq (NBIS) and headquartered in Amsterdam, we have a global footprint with R&D hubs across Europe, the UK, North America and Israel. Our team of 1,500+ includes hundreds of engineers with deep expertise across hardware, software and AI R&D. The role The Mechanical Operations Technician is responsible for the safe, reliable, and efficient operation, inspection, maintenance, and repair of mechanical systems supporting a mission-critical data center in Lappeenranta, Finland. Working as part of a 24/7 Critical Facilities Operations team, the technician ensures maximum equipment availability while supporting the site's commitments to energy efficiency, sustainability, and operational excellence. Key Responsibilities Critical Facilities Operations Operate and monitor mechanical infrastructure using the Building Management System (BMS) and routine field inspections. Respond to alarms, equipment faults, and operational events in accordance with Standard Operating Procedures (SOPs) and Emergency Operating Procedures (EOPs). Record equipment readings, operating parameters, and shift activities. Support planned switching operations and maintenance windows. Mechanical Maintenance Perform preventive, predictive, and corrective maintenance on mechanical equipment. Troubleshoot mechanical failures and carry out repairs or coordinate vendor support. Assist with commissioning, recommissioning, and integrated systems testing. Maintain accurate maintenance records using the Computerized Maintenance Management System (CMMS). Mechanical Systems Operate and maintain systems including: Chilled water systems CRAH and CRAC units Chillers Air Handling Units (AHUs) Pumps and hydronic distribution systems Heat exchangers HVAC systems District cooling and heat recovery systems (where applicable) Water treatment systems Mechanical valves and piping Expansion vessels and pressure systems Health, Safety & Compliance Work in accordance with Finnish occupational safety legislation and EU health and safety requirements. Follow Permit to Work (PTW), Lockout/Tagout (LOTO), and risk assessment procedures. Use appropriate Personal Protective Equipment (PPE). Participate in emergency response activities and incident investigations. Promote a strong safety culture and environmentally responsible work practices. Qualifications Education Vocational Qualification (Ammatillinen perustutkinto) or Bachelor's degree in Mechanical Engineering, HVAC, Building Services Engineering, Industrial Maintenance, or a related technical discipline. Equivalent technical or military experience may also be considered. Experience 2–5 years of experience maintaining mechanical systems in data centers, industrial facilities, manufacturing, hospitals, power generation, or other critical environments. Experience with Building Management Systems (BMS) and CMMS software is preferred. Technical Skills Knowledge of: HVAC and cooling systems Chilled water and hydronic systems Pumps, motors, and heat exchangers Mechanical fault diagnosis Building Management Systems (BMS) Computerized Maintenance Management Systems (CMMS) Mechanical drawings and Piping & Instrumentation Diagrams (P&IDs) Energy-efficient building systems Preferred Qualifications Occupational Safety Card (Työturvallisuuskortti) Hot Work Card (Tulityökortti) First Aid Certificate (EA1 or equivalent) Refrigerant handling qualification (where applicable) Fluent English (written and spoken) Finnish language skills are beneficial but not…