Job Description

DayOne is a data center pioneer developing and operating next-generation digital infrastructure for hyperscalers and large enterprises. We deliver reliable, cost-efficient, and scalable facilities designed for high-performance computing and cloud operations across Asia-Pacific.





Our portfolio spans Singapore, Johor (Malaysia), Batam (Indonesia), Greater Bangkok-Chonburi (Thailand), Hong Kong SAR, and Greater Tokyo, enabling us to support our partners' digital growth through engineering excellence, sustainability, and operational reliability.

Key Responsibilities

Customer & Solution Engagement + Engage customers and project stakeholders to define mechanical system requirements and performance objectives for data center facilities.
+ Provide technical consultation and develop mechanical system concepts, ensuring solutions meet capacity, reliability, and efficiency targets.
+ Support the sales and solutioning process by preparing mechanical design proposals, equipment strategies, and technical documentation.
Design Management & Engineering Oversight + Determine system architecture, design parameters, and control philosophies for chiller plants, CRAH/CRAC systems, cooling towers, pumps, and related HVAC infrastructure.
+ Ensure design compliance with DayOne's standards, regional codes, and international design practices (TIA-942, ASHRAE, Uptime Tier).
Technical Standards & System Optimization + Develop and continuously update DayOne's mechanical design standards, guidelines, and technical libraries for data center facilities.
+ Conduct capacity planning, load analysis, and energy performance assessments to optimize PUE, WUE, and lifecycle cost efficiency.
+ Evaluate and implement advanced mechanical technologies such as liquid cooling, high-efficiency chiller systems, and AI-driven environmental control.
+ Lead R&D initiatives for next-generation data center cooling technologies and sustainability-driven mechanical innovations.
Project Lifecycle Technical Management + Oversee mechanical system design implementation during construction, ensuring technical intent, constructability, and system integration are maintained.
+ Provide on-site engineering support for installation, testing and commissioning.
Cross-Functional Collaboration + Collaborate closely with Sales, Design Delivery and Operations teams across regions to ensure coordinated design and delivery of data center capacity.
+ Participate in design coordination workshops, peer reviews, and technical presentations across internal and external stakeholders.

Job Requirements


Education & Professional Background + Bachelor's degree or higher in Mechanical Engineering, Building Services Engineering, or equivalent discipline.
+ Familiar with data center design standards (TIA-942, ASHRAE TC9.9, Uptime Institute Tier Standards) and green building guidelines (SS564, LEED, Green Mark).
Experience & Technical Expertise + Minimum 8 years of experience in mechanical system design and design management for large-scale or hyperscale data center projects.
+ Proven track record in the complete mechanical design cycle -- concept, detailed design, construction, commissioning, and operations support.
+ Proficient in HVAC load calculation, hydraulic design, equipment selection, and system control logic development.
+ Strong understanding of chilled water systems, air-cooled and water-cooled plant configurations, cooling distribution networks, and airflow management.
+ Hands-on experience in liquid cooling technologies (direct-to-chip or immersion). Experience in projects exceeding 10 MW IT load is a distinct advantage.
+ Experience developing and maintaining design standards, managing design teams, or contributing to industry standards or best practice frameworks.
+ Regional data center project experience in Singapore, Malaysia, or APAC markets preferred.
Skills & Competencies + Excellent analytical, design coordination, and technical communication skills.
+ Strong leadership and problem-solving capabilities, with the ability to manage multiple projects concurrently.
+ High attention to technical detail and documentation quality.
+ Fluent in English (written and spoken); proficiency in regional languages is an advantage.
+ Proficient in MS Office, AutoCAD, Revit (BIM), and familiar with thermal simulation or CFD tools is beneficial.