Senior Mechanical Engineer - Hyperscale Data Center

DayOne; Lahti; On-site; EUR 48,000 - 65,000; Full time

Job summary

DayOne is building its flagship hyperscale data centre campus in Lahti, Finland. This Mechanical Engineer role focuses on maintaining and optimizing mechanical infrastructure to ensure uninterrupted operations at scale, including HVAC systems, chillers, cooling towers, pumps and compressors.

You will work with cross-functional teams to design, install, operate, and maintain essential mechanical systems, align with safety policies, and drive preventive maintenance to minimize downtime in a

Qualifications

• Degree in Mechanical Engineering or a related field.
• 3–5 years of experience in mechanical engineering, preferably within a data centre or critical infrastructure environment.
• Strong knowledge of mechanical infrastructure, including HVAC, chillers, cooling towers, pumps and compressors.
• Effective communication skills and the ability to work effectively with a multidisciplinary team.
• Proficiency in English, both written and spoken. Knowledge of Finnish is a plus.
• Ability to work in a fast-paced operational environment.

Responsibilities

• Assist in the design, installation, operation, and maintenance of mechanical systems within the data centres.
• Ensure all mechanical infrastructure, including HVAC systems, chillers, cooling towers, pumps and compressors, operates reliably and efficiently.
• Support the implementation and maintenance of mechanical safety policies, procedures, and best practices.
• Perform 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.

Skills

HVAC knowledge

Mechanical systems

Troubleshooting

Education

Degree in Mechanical Engineering

Job description

DayOne is building its flagship hyperscale data centre campus in Lahti, Finland. This Mechanical Engineer role focuses on maintaining and optimizing mechanical infrastructure to ensure uninterrupted operations at scale, including HVAC systems, chillers, cooling towers, pumps and compressors.

You will work with cross-functional teams to design, install, operate, and maintain essential mechanical systems, align with safety policies, and drive preventive maintenance to minimize downtime in a