Building Management System Engineer

Join 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 across Asia and Europe — and we’re just getting started.

As we expand into new international markets, we’re looking for talented, driven individuals to join us on this exciting journey. This is more than a job — it’s an opportunity to be a key contributor to our dynamic team and help shape the future of global data infrastructure.

If you're passionate about innovation, technology, and growth, we invite you to be part of DayOne’s next chapter.

About the Role

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.

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 help ensure reliable environmental conditions within a mission-critical environment.

Your key responsibilities will include:

System Maintenance and Optimization

Performing regular maintenance and troubleshooting of BMS hardware and software.

Optimizing system performance to ensure energy efficiency and reliability.

Monitoring and adjusting BMS parameters to maintain optimal environmental conditions.

Data Analysis and Reporting

Analyzing BMS data to identify trends, inefficiencies, and potential issues.

Generating reports on system performance, energy usage, and maintenance activities.

Providing actionable recommendations based on