Senior Mechanical Engineer - HVAC, Cooling (Data Centre)

About Nscale Nscale is taking on the hyperscalers by building a vertically integrated cloud built for AI. We own the data centres, software, and applications that power today's AI stack using sustainable technology solutions. We thrive on a culture of relentless innovation, ownership, and accountability, where every team member takes pride in their work and drives it with excellence and urgency. As a Nscaler, you’ll build trust through openness and transparency, where everyone is inspired to do their best work. Collaboration is key, and we work together swiftly and respectfully, embracing adaptability and resilience in all we do. Design and Construction Mechanical Engineer Role will be based in Gumi, South Korea The Mechanical Engineer plays a critical role as the Mechanical Engineering System subject matter expert for the design and construction of both our greenfield, brownfield, colocation data centres in Korea region. His/her responsibilities include designing new data centres, reviewing designs from colocation operators with expertise in mechanical engineering to ensure that the mechanical system is capable to support high-density AI workloads. You will be involved in hands on design experience across the project lifecycle from concept design through construction, to commissioning and handover. You will be relied on as a subject matter expert in the mechanical engineering field. You will ensure sites operate at peak performance, meet uptime targets, and scale to support high-density AI workloads. Key Responsibilities • Lead mechanical designs in collaboration with other disciplines to create a coordinated construction document set • Drive innovation and R&D for emerging technologies (e.g., liquid cooling integration, advanced monitoring) • Participate in site selection reviews and work with local utilities to understand and define site utility requirements • Design and develop Mechanical systems for new and existing data centres, including but not limited with ACMV system, Hydraulic system and thermodynamics refrigeration cycle, Fire Protection System, Plumbing & Sanitary System, etc. • Perform engineering calculation (i.e. cooling load calculation, hydraulic calculation, etc.), equipment sizing (i.e. chiller, pump, cooling tower, air handler, heat exchanger systems) and selection and procurement of equipment ensuring it meets safety standards and performance requirements • Extensive experience of large-scale chilled water plant including chillers, chilled water distribution and storage systems, Liquid Cooling systems, cooling towers, and chemical dosing systems • Creation of designs which meet or exceed our quality requirements and within our budgetary requirements. • Work with regional vendors and manufacturers to specify the appropriate mechanical equipment • Work with local agencies having jurisdiction to ensure compliance with authority requirements, the various APAC wide design codes and other jurisdictional requirements • Review and approval of equipment submittals and ability to work on concurrent projects in multiple geographical regions • Define project scope and provide technical support for information requests prior to, and during construction phases • Conduct engineering analysis, feasibility studies, and value engineering for cost and performance optimization • Work with commissioning teams to properly test and validate installation, operation, and performance of mechanical systems • Conduct root cause analysis and implement corrective actions for mechanical system issues • Update and maintain the internal design specifications, drawings, and standards in accordance with the latest configurations and including all 'lessons learned' in relation to all equipment • Travel to sites within Korea for site review and work with onsite field engineers, as well as provide engineering evaluations, electrical systems audits, and startup as needed. Qualifications • Bachelor’s degree in Mechanical Engineering. • 7-10+ years of experience in n designing and maintaining mechanical systems for data centers, including 5+ years in mission-critical facilities • Knowledge of large-scale mission critical facility’s Mechanical infrastructure systems • Experience in high-density AI/HPC workloads • Licensed Professional Engineer (PE) or Chartered Engineer certification is an advantage • Fundamental knowledge in of thermodynamics, fluid mechanics, and heat transfer principles, fire protection and plumbing and sanitary system • In-depth knowledge of critical data center electrical systems, including: • Proven ability to research and implement new designs and technologies from concept through deployment • Experience managing supplier relationships and conducting factory acceptance tests. • Proficiency with modelling software tools (e.g., AutoCAD, Revit, BIM). In All We Do, Our Core Values Guide Us Relentless Innovation At Nscale, we constantly push the boundaries of innovation, embracing creative risks to shape the future. Our aim is to deliver products that not only meet but exceed today’s expectations, setting new standards for tomorrow. Ownership and Accountability Every Nscaler is fully accountable for their work, driving it with excellence and urgency. We set high standards, ensuring that our contributions are not just good but exceptional. Openness and Transparency We believe trust and transparency are key to our success. We maintain open communication within our teams and with stakeholders, sharing both successes and challenges. Our open-source approach allows customers to explore our technology, building trust and ensuring our solutions are both innovative, secure, and reliable. Customer-Centric Focus Our customers are central to our mission, and we are committed to delivering impactful solutions that drive real-world success. We focus on deeply understanding their needs and challenges, striving to exceed expectations in both product quality and service. Sustainability We are dedicated to considering the long-term environmental and societal impacts of our technologies. By integrating sustainability into our operations and product development, we ensure that our innovations are both effective and responsible, contributing positively to the world around us. Full-Speed Collaboration Collaboration at Nscale is fast, efficient, and respectful. We work together seamlessly, with clear communication and mutual respect, ensuring our shared goals are met with high standards and impactful outcomes. Equal Opportunities Statement We strongly encourage applications from people of colour, the LGBTQ+ community, people with disabilities, neurodivergent people, parents, carers, and people from lower socio-economic backgrounds. If there’s anything we can do to accommodate your specific situation, please let us know. The responsibilities outlined in this job description are not exhaustive and are intended to provide a general overview of the position. The employee may be required to perform additional duties, tasks, and responsibilities as assigned by management, consistent with the skills and qualifications required for the role. For information on how Nscale handles candidate personal data, please see our Employee & Candidate Privacy Notice: Here. For information on how Nscale handles candidate personal data, please see our Employee & Candidate Privacy Notice: Here. Nscale does not accept unsolicited candidate submissions from recruitment agencies.