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DayOne is building its flagship hyperscale data center campus in Lahti, Finland. As Site Operations Manager you will oversee the operational management and performance of multiple data center facilities within a designated cluster, ensuring uptime and service quality around the clock.You will lead technical and operational teams, drive maintenance, safety,...

DayOne Data Centers Limited is expanding its Lahti campus and seeks a Data Centre Admin to coordinate daily operations, maintenance, and safety in a world-class data centre environment. You will support efficient service delivery, energy management, and compliance across facilities teams.The role focuses on safe, well-maintained spaces, collaboration with...

DayOne in Lahti is seeking a Cluster Operations Manager to oversee multiple data center facilities, ensuring uptime, reliability and efficient operation of critical infrastructure. You will lead technical and operations teams, implement best practices, and drive 24/7 performance across the cluster.The role requires 7–10 years in data center operations with...

DayOne is expanding its flagship data center campus in Lahti, Finland. We seek an Assistant Facilities Engineer to support Critical Services and Building Services, ensuring safe, compliant, and efficient operation of mechanical, electrical and building systems.You will work with a multidisciplinary team to maintain uptime and drive continuous improvement....

DayOne Data Centers Ltd. in Lahti, Finland, seeks a Cluster Operations Manager to lead day-to-day and 24/7 operations across multiple data centers. You will drive uptime, safety, and performance while guiding technical and operations teams.The role requires 7–10 years in data center ops with 3–5 years in management, strong leadership, English...

DayOne is building its flagship hyperscale data center campus in Lahti, on a former industrial site in Kiveriö. The campus uses Finland’s naturally cool climate for free cooling, with air‑cooled chillers to minimize freshwater use.As a Data Centre Admin you will coordinate daily operations and maintenance, ensuring a safe, efficient environment for...

DayOne is building its flagship hyperscale data center campus in Lahti, Finland. As Critical Services Manager, you will lead the mechanical, electrical and BMS engineering teams and run the 24/7 shift to ensure uninterrupted operations of the data centre.You will develop SOPs, track KPIs under SLAs, manage budgets, and coordinate with contractors to drive...

DayOne in Lahti is seeking an Assistant Facilities Engineer to support the Critical Services and Building Services teams, ensuring safe and efficient operation of MEP systems in our new data center campus.You will gain exposure to end-to-end data centre operations, drive preventive maintenance, and collaborate with vendors to plan upgrades while maintaining...

DayOne Data Centers Ltd. in Lahti, Finland, seeks a proactive Shift Lead to supervise a team of shift technicians in a high‑performance data center campus.You will ensure 24/7 operations, manage handovers, and coordinate incident response to maintain critical services. Responsibilities include supervising daily operations, driving safety compliance,...

DayOne Data Centers Ltd. in Lahti, Finland, seeks a Maintenance Planner to oversee maintenance planning for data center infrastructure. You will coordinate preventative and corrective maintenance with engineers, technicians, vendors and contractors, and ensure CMMS data accuracy and regulatory compliance.You’ll support lifecycle planning and budgeting,...

DayOne is building its flagship hyperscale data center campus in Lahti, Finland. As a Building Management System Engineer, you will be responsible for ensuring the efficient operation, maintenance, and optimization of the building management systems across our data center facilities.You will monitor system performance, support upgrades and integrations, and...

DayOne Data Centers Ltd. in Lahti, Finland, seeks an Assistant Facilities Engineer to support Critical Services and Building Services, ensuring safe, efficient operation of MEP systems.You will collaborate with shift teams, plan maintenance, work with vendors, and help maintain compliance with building codes and EH&S standards. English required; Finnish...

About DayOne Data Centers DayOne Data Centers is a Singapore-headquartered global digital infrastructure platform that develops and operates next-generation data centers across Asia Pacific and Europe. Trusted by leading hyperscalers and businesses, the company engineers, builds, and operates high-capacity, AI-ready campuses with speed, scale, and...

Join DayOne - Shaping the Future of Data InfrastructureDayOne is a global leader in the development and operation of high-performance data centers. As one of the fastest-growing companies in the industry, we've built a robust presence across Asia and Europe - and we're just getting started.As we expand into new international markets, we're looking for...

Cluster Operations Manager# Careers## Cluster Operations ManagerApply: Lahti: Full time: Posted Today: JR3463Join DayOne – Shaping the Future of Data Infrastructure DayOne is a global leader in the development and operation of high-performance data centers. As one of the fastest-growing companies in the industry, we’ve built a robust presence...

Job Summary DayOne is building its flagship hyperscale data center campus in Lahti, on a former industrial site in Kiveriö. The campus is designed to use Finland's naturally cool climate for free cooling, with air-cooled chillers that remove the need for freshwater cooling. Join the Lahti team early and help shape how a campus of this scale is built,...

DayOne Data Centers Singapore Pte. Ltd. is seeking an Electrical Engineer to join the Lahti campus team, building and maintaining critical electrical infrastructure for our hyperscale data centres.You will design, install, operate and service power distribution units, UPS, generators and switchgear, ensuring safety, uptime and compliance while working with...

DayOne Data Centers Ltd. in Lahti is seeking a Data Centre Admin to coordinate daily operations and maintenance of the data centre services.You will ensure a safe, efficient, and well-maintained environment for occupants and visitors, supporting overall functionality and comfort. Responsibilities include coordinating with internal teams and external vendors,...

DayOne is building a flagship hyperscale data center campus in Lahti, Finland. We seek a Building Management System Engineer to ensure efficient operation, maintenance, and optimization of BMS across data center facilities.You’ll monitor performance, support upgrades, and drive reliable environmental conditions in a mission-critical environment. Key...

DayOne is building its flagship hyperscale data center campus in Lahti, Finland. As Building Services Manager you will oversee security & soft services, lead the building services team, and coordinate contractors to keep multiple data center facilities safe, efficient, and compliant.You will apply a technical qualification in Facilities Management or...