Senior Mechanical Engineer

LahtiCompetitive0 applicants

About this role

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 reliability.

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, commissioned, and run.

Mechanical Engineer plays a crucial role in maintaining mechanical infrastructure and systems of our hyperscale data centres. This role ensures the continuous and efficient operation of mechanical systems, supporting both routine maintenance and emergency repairs.

Responsibilities

  • Mechanical System ManagementAssist in the design, installation, operation, and maintenance of mechanical systems within the data centres.
  • Ensure all mechanical infrastructure, including HVAC systems, chillers, cooling towers, and fire suppression systems, operates reliably and efficiently.
  • Support the implementation and maintenance of mechanical safety policies, procedures, and best practices.
  • Maintenance and UpgradesPerform preventative and corrective maintenance activities, ensuring all mechanical equipment and systems are serviced according to company and manufacturer standards.
  • Coordinate with vendors and contractors for mechanical maintenance and upgrade projects, ensuring minimal impact on operations.
  • Implement preventive maintenance strategies to minimize downtime.
  • Safety and Compliance:Adhere to all relevant health, safety, and environmental regulations, ensuring compliance with industry standards and best practices.
  • Participate in safety audits

EU Requirements

Job Details

Posted25 October 2026
Closes24 November 2026

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