Lead Mechanical Engineer (Data Center Infrastructure)

Giga Energy builds the electrical infrastructure that powers the modern world, manufacturing transformers and modular data centers. As Lead Mechanical Engineer, you will own the mechanical design of next-generation facilities, developing the mechanical Plan of Record for Giga Data Centers and ensuring high-density AI cooling solutions.

Responsibilities:

• Develop and maintain the mechanical POR for Giga Data Centers, defining the "Gold Standard" design that enables manufacturing of reliability and efficiency at scale
• Author and own the internal engineering library including technical specifications and Basis of Design documents, deciding what we build and how we measure it
• Design to global and local standards, leveraging ASHRAE TC 9.9 to define environmental envelopes for AI hardware and ensuring compliance with ASHRAE 90.1 for energy efficiency
• Guide external engineering firms to localize designs while maintaining strict adherence to core performance intent and standardization requirements
• Validate airflow patterns and rack-level thermal performance using computational fluid dynamics, ensuring compliance with ASHRAE thermal guidelines for Class A1-A4 environments
• Execute rigorous hydraulic analysis and thermal load flow studies, conducting pipe stress analysis per ASME B31 standards to ensure system integrity under thermal expansion and seismic events
• Engineer complex cooling loops (Direct-to-Chip, Immersion, RDHx) aligned with OCP (Open Compute Project) specifications for liquid cooling interoperability
• Select and specify pumps, fans, chillers, dry coolers, and control valves for high-density compute environments
• Create detailed Bills of Material (BOMs), Quantity Take Offs (QTOs), and Commissioning scripts to support a manufacturing-first supply chain
• Develop Sequence of Operations (SOO) and Control Narratives that dictate how mechanical systems respond to dynamic AI load changes
• Use advanced simulation tools to optimize thermal performance and validate designs before manufacturing

Requirements:

• Professional Engineer (PE) license required
• Bachelor's or Master's degree in Mechanical Engineering
• 7+ years of mechanical engineering experience with strong focus on mission-critical or industrial facilities
• Deep working knowledge of ASHRAE TC 9.9 (Thermal Guidelines for Data Processing Environments)
• Familiarity with ASME B31.3/B31.9 (Process Piping) for liquid cooling loops
• Strong background in CFD analysis using tools like 6Sigma or Ansys
• Experience with pipe stress analysis software (Caesar II or AutoPIPE)
• Proficiency in Revit/AutoCAD for mechanical design
• Experience with hydraulic modeling software (AFT Fathom or Pipe-Flo)
• Proven ability to create engineering standards from scratch rather than just following existing ones
• Strong understanding of high-density cooling solutions and thermal management
• Experience specifying HVAC equipment including chillers, pumps, and cooling towers
• Track record developing standardized designs for scalable deployment
• Understanding of OCP (Open Compute Project) cooling initiatives and specifications
• Experience with liquid cooling technologies (Direct-to-Chip, Immersion, RDHx)
• Background in data center or high-density compute facility mechanical design
• Knowledge of ASHRAE 90.1 energy efficiency requirements
• Experience with manufacturing-first design approach (DfMA principles)
• Startup or high-growth company experience
• Track record creating Plans of Record for manufactured products
• Experience managing A&E firms and maintaining design standards across partners
• Familiarity with commissioning processes and functional testing for mechanical systems
• Understanding of AI infrastructure thermal requirements and challenges
• Experience with design-build or fast-track project delivery