Senior Manager, Commissioning

DayOne; Malaysia; On-site; MYR 180,000 - 280,000; Full time

Job summary

DayOne in Malaysia seeks a Commissioning Manager to plan, coordinate, and execute commissioning for mission-critical data center projects. You will ensure systems are designed, installed, tested, and operated to meet uptime and efficiency targets.

You will lead cross-functional teams, develop plans, review designs, perform IST, and mentor operations staff during handover, while managing budgets and timelines in a fast-growing data center business.

Qualifications

• 8–15+ years of experience in mission-critical facilities or data centers.
• Proven track record delivering commissioning for Tier III/IV data centers.
• Strong knowledge of electrical distribution, cooling, and control systems.

Responsibilities

• Lead commissioning lifecycle from design review to handover and post-occupancy support.
• Develop commissioning plans, procedures, and schedules.
• Coordinate with design consultants, contractors, vendors and clients.
• Oversee pre-functional and functional testing of electrical, mechanical, and BMS/DCIM systems.
• Ensure compliance with ASHRAE and Uptime Institute guidelines.
• Prepare commissioning documentation, reports, and checklists.

Skills

Leadership

Project management

Problem-solving

Stakeholder management

Documentation

Education

Bachelor’s degree in Mechanical, Electrical, or related Engineering field

Tools

Electrical distribution systems

Cooling systems

Control systems

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.

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

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.

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