Job description
Join Day. One – Shaping the Future of Data Infrastructure Day. One 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 Day. One’s next chapter.
Job Summary
The Commissioning Manager is responsible for planning, coordinating, and executing the commissioning process for mission-critical data center projects. This role ensures that all systems (mechanical, electrical, controls, and IT infrastructure) are designed, installed, tested, and operated according to project requirements and industry standards, with a strong focus on reliability, efficiency, and uptime.
Key Responsibilities
Lead and manage the full commissioning lifecycle from design review through to handover and post-occupancy support Develop and implement commissioning plans, procedures, and schedules Coordinate with design consultants, contractors, vendors, and client stakeholders Review design documents to ensure commissionability and operational efficiency Oversee pre-functional and functional testing of systems including: Electrical systems (UPS, generators, switchgear) Mechanical systems (HVAC, CRAH/CRAC units, chillers) Building Management Systems (BMS) / DCIM Manage integrated systems testing (IST) and simulate failure scenarios Ensure compliance with industry standards such as ASHRAE and Uptime Institute guidelines Identify, track, and resolve commissioning issues and deficiencies Prepare and maintain commissioning documentation, reports, and checklists Support training of operations teams and ensure smooth handover Manage commissioning budgets, timelines, and resources Qualifications & Experience Bachelor’s degree in Mechanical, Electrical, or related Engineering field 8–15+ years of experience in mission-critical facilities or data centers Proven experience managing commissioning for Tier III / Tier IV data centers Strong knowledge of: Electrical distribution systems (MV/LV) Cooling systems and redundancy configurations Control systems and automation Familiarity with commissioning standards and best practices Skills & Competencies Strong leadership and project management skills Excellent problem-solving and troubleshooting abilities Ability to manage multiple stakeholders in high-pressure environments Detail-oriented with strong documentation skills Effective communication and reporting skills 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.