Lead Mechanical Engineer (Data Center Infrastructure)

Giga Energy

2h•Remote

About The Position

Giga builds the electrical infrastructure that powers the modern world. We manufacture transformers, switchboards, and modular data centers for customers across the United States and the globe. Together, our team combines fresh perspectives with deep industry experience to solve real-world problems for our customers. We move fast and think practically. If you're ready to make an impact in an industry that matters, we're looking for people like you. Giga's mission is to manufacture data centers to support the AI ramp. We're moving beyond traditional construction to a product-based approach, designing and mass-producing high-performance infrastructure that can keep pace with the exponential demand for compute. As Lead Mechanical Engineer, you'll own the mechanical design of these next-generation facilities. This is a rare opportunity to define the mechanical DNA of a rapidly scaling infrastructure company. You won't just be managing a single build—you'll be creating the Plan of Record (POR) for Giga Data Centers, a standardized, manufactured product that will be deployed globally. You'll set the standard for high-density AI cooling, designing liquid cooling loops, thermal management systems, and mechanical infrastructure that can handle the most demanding compute workloads on the planet. The AI ramp is the defining industrial challenge of our time, and you'll build the engine that powers it. Your designs will be manufactured and deployed rapidly, with direct impact visible across hundreds of facilities.

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

Nice To Haves

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

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