Senior Electrical Engineer

About Day. One Data Centers Day. One 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

Day. One 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.

Electrical Engineer plays a crucial role in maintaining the electrical infrastructure and systems of our hyperscale data centres. The role involves ensuring continuous and efficient operation of all electrical systems, Key Responsibilities Electrical System Management Assist in the design, installation, operation, and maintenance of electrical systems, including power distribution units, uninterruptible power supplies (UPS), generators, and switchgear.

Ensure all electrical infrastructure operates efficiently, with minimal downtime, and adheres to established performance standards. Support the implementation and maintenance of electrical safety policies and best practices. Maintenance and Upgrades Perform preventative and corrective maintenance activities, ensuring all electrical equipment and systems are serviced according to company and manufacturer standards.

Assist in coordinating with vendors and contractors during electrical maintenance and upgrade projects, ensuring minimal disruption to data centre operations. Monitor system performance and recommend improvements or upgrades as necessary. Technical Support and Troubleshooting Provide hands-on technical expertise to troubleshoot and resolve electrical issues in a timely manner, ensuring minimal impact on data centre operations.

Collaborate with other engineering and operations teams to ensure integrated and efficient system performance. Maintain up-to-date documentation and records to support operational continuity and compliance requirements. Safety and Compliance: Adhere to all relevant health, safety, and environmental regulations, ensuring compliance with industry standards and best practices.

Participate in safety audits and contribute to the continuous improvement of safety protocols within the data centre. Strategic Initiatives: Support the Electrical Engineering Manager and Critical Services Manager in developing and implementing strategic initiatives to enhance electrical system performance and support business growth.

Team Collaboration Work closely with other engineers, technicians, and the Electrical Engineering Manager to ensure seamless 24/7 operations. Participate in training and development programs to enhance personal and team capabilities. What We’re Looking For Degree in Electrical Engineering or a related field. 3-5 years of experience in electrical engineering, preferably within a data centre or critical infrastructure environment.

Strong knowledge of electrical infrastructure including power distribution, UPS systems, generators, and switchgear, and the ability to resolve complex electrical challenges. 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. Proactive, solutions-oriented mindset with high integrity and a collaborative working style. Why Join Day. One? 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.

Day. One is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. If you're ready to grow with one of the fastest-moving companies in the data center industry, apply now and be part of our global journey.