About DayOne Data Centers
DayOne 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.
Position Overview
The MCR Team is a specialised, in-house engineering organisation designed to provide rapid response, advanced troubleshooting, and self-perform maintenance for mission-critical systems across the data centre portfolio.
The Mechanical Engineer is responsible for overseeing and performing mechanical maintenance, troubleshooting, and repair activities across mission-critical mechanical systems in the data centre. This includes chilled water systems, FWU/CRAC equipment, CDU, pumps, valves, motors, heat exchangers, and other HVAC/mechanical infrastructure.
The Mechanical Engineer ensures safe execution of work, restoration of system functionality, and compliance with operational and safety standards, supporting site reliability and uptime.
Key Responsibilities
- Perform mechanical maintenance, troubleshooting, and component replacement on CHW systems, pumps, motors, valves, FWU/CRAC equipment, and related mechanical systems.
- Diagnose mechanical faults and conduct repair works on chillers, heat exchangers, CDU units, VFD-driven equipment, and mechanical control devices.
- Assist in developing MOPs and SOPs for mechanical maintenance and ensuring all works are carried out safely and accurately.
- Supervise mechanical technicians and ensure safe and proper execution of mechanical tasks.
- Review maintenance quality, verify safety permits, and ensure accuracy of mechanical documentation and reporting.
- Support emergency response during cooling or mechanical-related incidents and assist in system stabilisation and recovery.
- Conduct routine mechanical inspections, identify risks, and raise early warnings to prevent system failure.
- Ensure compliance with statutory requirements, internal standards, and maintenance logs, and keep mechanical service records up to date.
Candidate Requirements
- Diploma/Degree in Mechanical Engineering or related discipline.
- 3+ years hands-on experience in mechanical maintenance within data centres, critical facilities, or industrial mechanical systems.
- Strong understanding of CHW systems, FWU/CRAC equipment, pumps, valves, motors, CDU, heat exchangers, etc.
- Ability to supervise and guide mechanical technicians during maintenance and repair works.
- Good knowledge of safety practices including LOTO, chemical handling, and mechanical isolation procedures.
- Proven experience in troubleshooting mechanical systems and implementing effective repair solutions.
- Ability to work under pressure during critical incidents.
- Willing to be on call 24 X 7
DayOne 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.
Skills Required
- Diploma or degree in Mechanical Engineering or a related discipline
- At least 3 years of hands-on mechanical maintenance experience in data centers, critical facilities, or industrial mechanical systems
- Strong understanding of chilled water systems, FWU/CRAC equipment, pumps, valves, motors, CDUs, and heat exchangers
- Ability to supervise and guide mechanical technicians during maintenance and repair work
- Knowledge of LOTO, chemical handling, and mechanical isolation procedures
- Proven experience troubleshooting mechanical systems and implementing effective repair solutions
- Ability to work under pressure during critical incidents
- Willingness to be on call 24 hours a day, 7 days a week
What We Do
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.
