Staff Mechanical Engineer (Data Center Cooling)

• Own cooling-system standards and reference architectures for large-scale AI data centers
• Design the complete thermal path from GPU and rack heat capture through facility distribution and final heat rejection
• Translate server, rack, and cluster requirements into coolant temperature, flow, pressure, water-quality, and facility-capacity requirements
• Develop air-cooled, liquid-cooled, and hybrid cooling architectures for greenfield, retrofit, and partner-operated facilities
• Design central plants, technology cooling-water loops, CDUs, heat exchangers, pumps, piping, chillers, cooling towers, dry coolers, and adiabatic systems
• Perform thermal, hydraulic, pressure-drop, heat-transfer, psychrometric, and equipment-capacity calculations
• Evaluate system performance across site climate conditions, compute-load changes, equipment failures, and maintenance scenarios
• Develop and review P&IDs, equipment schedules, layouts, specifications, sequence of operation, and basis-of-design documents
• Define requirements for redundancy, thermal ride-through, failure isolation, maintainability, efficiency, and water consumption
• Establish requirements for coolant chemistry, materials compatibility, filtration, flushing, cleanliness, leak detection, and fluid management
• Review partner designs, vendor submittals, equipment selections, and construction documents for compliance with Lambda standards
• Coordinate cooling interfaces across hardware engineering, electrical engineering, controls, construction, commissioning, and operations
• Support equipment testing, construction sequencing, commissioning, cooling-system bring-up, and initial GPU loading
• Investigate thermal events and cooling failures, incorporating lessons into future designs and operating standards
• Travel to project sites, manufacturers, and partner facilities as needed

Benefits

• Health, dental vision
• 401k match
• 5 sick days and 12 paid holidays
• Flexible PTO
• Paid parental, medical, and caregiver leave- Communicate clearly across engineering, construction, operations, equipment vendors, and executive stakeholders
• Understand hydronic design, heat transfer, pumping, heat exchangers, chilled-water systems, and heat-rejection equipment
• Can develop and review P&IDs, equipment specifications, mechanical layouts, and engineering calculations
• Understand cooling-system redundancy, failure domains, thermal ride-through, maintainability, and operational risk
• Hold a bachelor’s degree in mechanical engineering or equivalent practical experience
• Have experience designing cooling systems for data centers, mission-critical facilities, central plants, or large industrial environments
• Understand the relationship between GPU behavior, rack density, coolant conditions, and facility cooling capacity
• Have experience with direct-to-chip liquid cooling, CDUs, technology cooling-water loops, or other high-density cooling systems
• Can model system capacity, flow, pressure loss, temperature approach, and performance across varying operating conditions
• Can balance reliability, efficiency, water consumption, equipment cost, and delivery schedule
• Experience with warm-water cooling, water-side economization, dry coolers, or adiabatic heat rejection
• Familiarity with ASHRAE TC 9.9 guidance and liquid-cooling industry standards
• Experience designing cooling for hyperscale, colocation, HPC, or AI data centers
• Experience supporting multi-megawatt liquid-cooled GPU deployments
• Familiarity with CFD, Pipe-Flo, AFT Fathom, Revit, or comparable engineering tools
• Knowledge of coolant chemistry, glycol systems, corrosion control, filtration, and wetted-material compatibility
• Experience with factory testing, commissioning, integrated systems testing, or live system bring-up
• Professional Engineer licensure or progress toward licensure