Critical Services Manager

DigitalLand Services (FI) Oy; Lahti; On-site; EUR 90,000 - 130,000; Full time

Job summary

DayOne, a leader in hyperscale data center development, seeks a Critical Services Manager in Lahti to oversee mechanical, electrical, and BMS engineering teams and the 24/7 shift crew. You’ll ensure uninterrupted operations and drive continuous improvement across critical infrastructure in a fast‑paced environment.

The role requires 7–10 years in data center operations with managerial experience, strong HVAC/electrical/BMS expertise, and excellent English. Finnish language skills are a plus.

Qualifications

• Degree in Mechanical or Electrical Engineering or related field.
• 7-10 years in data centre operations with managerial exposure.
• Strong knowledge of HVAC, electrical systems, generators, UPS, and BMS.
• Proficiency in English; Finnish language is an advantage.

Responsibilities

• Lead, mentor, and develop mechanical, electrical, and BMS engineering teams to support high performance and professional growth.
• Oversee the 24/7 shift team, ensuring effective communication and coordination to maintain continuous operations.
• Ensure efficient and reliable operation of all critical systems, including HVAC, electrical distribution, generators, UPS, and BMS.
• Develop and implement SOPs for maintenance and emergency response.
• Monitor system performance and implement improvements to enhance reliability and efficiency.
• Ensure operations adhere to safety protocols and regulatory standards.

Skills

Leadership

Analytical thinking

Problem-solving

English proficiency

Finnish knowledge (advantage)

HVAC knowledge

Electrical systems

BMS expertise

Education

Mechanical or Electrical Engineering degree

Job description

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.

Location: Lahti, Kiveriö

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 Critical Services Manager, you are responsible for overseeing the Mechanical, Electrical, and Building Management System (BMS) engineering teams, as well as managing the 24/7 shift team to ensure uninterrupted operations of the data centre.

Key Responsibilities

• Lead, mentor, and develop the mechanical, electrical, and BMS engineering teams to support high performance and professional growth.
• Oversee the 24/7 shift team, ensuring effective communication and coordination to maintain continuous operations.
• Ensure the efficient and reliable operation of all critical systems, including HVAC, electrical distribution, generators, UPS, and BMS.
• Develop and implement standard operating procedures (SOPs) for maintenance and emergency response.
• Monitor system performance and implement improvements to enhance reliability and efficiency.
• Ensure all operations and maintenance activities are conducted in compliance with SLAs.
• Develop and track key performance indicators (KPIs) to measure compliance and performance.
• Address and resolve issues that could impact SLA compliance.
• Manage and oversee critical infrastructure projects, including upgrades, expansions, and maintenance.
• Coordinate with internal teams and external contractors to ensure projects are completed on time, within scope, and budget.
• Ensure all operations adhere to safety protocols and regulatory standards.
• Conduct regular safety audits and drills to support team readiness for emergency situations.
• Maintain documentation and records in compliance with regulatory and company requirements.
• Develop and manage the budget for the critical services department.
• Monitor expenditures and implement cost‑saving measures without compromising service quality.
• Foster a culture of continuous improvement by encouraging innovation and process enhancements.
• Stay informed about industry trends and technologies to support the adoption of best practices.

Requirements

• Technical Skills
• Degree in Mechanical Engineering, Electrical Engineering, or a related field.
• 7-10 years of experience in data centre operations or a similar critical infrastructure environment, including experience in a managerial role.
• Strong knowledge of HVAC, electrical systems, generators, UPS, and BMS.
• Familiarity with industry standards and regulatory requirements.
• Soft Skills
• Strong leadership skills and experience managing multidisciplinary engineering teams.
• Strong analytical and problem‑solving abilities.
• Ability to work effectively in a fast‑paced operational environment.
• Proactive and solutions‑oriented approach with a collaborative working style.
• Proficiency in English, both written and spoken.
• Knowledge of Finnish is considered an advantage.

Why Join DayOne?

Be a part of a company scaling fast in a booming industry. Work on an international stage with global leaders. Shape your career in a culture that values curiosity, agility, and bold thinking. For more information about us, please visit Data Center Company Built For Hyperscale.

We Are an Equal Opportunity Employer

DayOne is an equal opportunity employer committed to building a diverse and inclusive workplace. We welcome applications from all qualified individuals regardless of race, ethnicity, gender, sexual orientation, age, disability, religion, or any other characteristic protected by applicable law. We believe that diverse perspectives strengthen our team and drive better outcomes for the communities we serve worldwide. DayOne is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

DayOne is a data center pioneer that develops and operates next‑gen digital infrastructure for industry leaders who demand reliable, cost-effective and quickly scalable solutions. Our cutting‑edge facilities empower hyperscalers and large enterprises to achieve rapid deployment and enhance connectivity, driving transformative engagement and innovation as we shape the future of industries. DayOne's data centers are located across key markets, including Singapore, Johor (Malaysia), Batam (Indonesia), Greater Bangkok, Hong Kong SAR, Tokyo, and beyond. Headquartered in Singapore, DayOne’s leadership team draws on over two decades of industry experience and a track record of building Asia's largest data center business. With DayOne, they have created the SIJORI (Singapore, Johor, and Riau Islands) market as a global data center hub. As demand for strategically located and customized data centers rises, DayOne's entrepreneurial spirit, customer‑first strategy, deep local partnerships, and agile executional capabilities uniquely position us to power the growth ambitions of leading hyperscalers and large enterprises around the world.