Cooling Engineer

Location:

Spartanburg, SC

Employment Type:

Direct Hire

The Hybrid Space Liquid Cooling Subject Matter Expert (SME) serves as the technical authority and hands‑on expert for liquid cooling systems supporting high-density compute environments within a High-Performance Compute Center (HPCC). Reporting to the Hybrid Space Liquid Cooling Operations Manager, this role owns the day-to-day technical execution, troubleshooting, optimization, and validation of direct-to-chip liquid cooling systems, Coolant Distribution Units (CDUs), Rear Door Heat Exchangers (RDHXs), and associated controls and water chemistry systems.

This is a deeply technical, operational role that functions as the escalation point for complex cooling issues in a 24/7 mission‑critical environment. The SME works closely with Operations, Mechanical, Electrical, and Controls teams to ensure thermal reliability, rapid fault isolation, and continuous system optimization.

• Serve as the primary technical authority for Hybrid Space liquid cooling systems, including CDUs, RDHXs, rack‑level cooling loops, isolation valves, and supporting mechanical equipment
• Perform advanced troubleshooting, fault isolation, and corrective actions for cooling‑related alarms, failures, and performance anomalies
• Support real‑time monitoring and analysis of temperatures, pressures, flows, and delta‑T metrics
• Optimize system efficiency, stability, and reliability through data‑driven analysis and field validation
• Support commissioning activities, system modifications, and upgrades impacting liquid cooling infrastructure
• Monitor and maintain water chemistry to ensure corrosion control, biological stability, and OEM compliance
• Perform sampling, testing, and analysis of system fluids (pH, conductivity, inhibitors, biological indicators)
• Coordinate with water treatment vendors on filtration, chemical dosing, and corrective actions
• Identify early indicators of fluid degradation or system risk and escalated proactively

• Act as the primary technical escalation resource for operators and third‑party service providers
• Support incident response, root cause analysis, and post‑event reviews
• Collaborate with Mechanical, Electrical, and Controls teams to ensure hydraulic balance, thermal integration, and system redundancy
• Participate in change management reviews impacting compute cooling systems
• Maintain accurate as‑built documentation, operating procedures, and maintenance records
• Provide technical input for preventive maintenance tasks, procedures, and schedules
• Execute and support preventive maintenance on CDUs, RDHXs, isolation valves, and related components
• Train and mentor operators and technicians on liquid cooling systems
• Support performance trending, reporting, and identification of improvement opportunities
• Contribute technical recommendations for long‑term system enhancements

• Adhere to all EHS, Lockout/Tagout, confined space, and chemical handling requirements
• Ensure proper PPE usage and safe work practices
• Support compliance with applicable NFPA, ASHRAE, OSHA, and site‑specific standards

• Bachelor’s degree in Mechanical Engineering, Facilities Engineering, or related discipline, or equivalent hands‑on experience
• 6+ years of experience in mission‑critical environments (data centers, HPC, or industrial cooling systems)
• Direct hands‑on experience with liquid cooling technologies such as CDUs, RDHXs, and/or direct‑to‑chip systems
• Strong knowledge of water chemistry management, corrosion control, and industrial cooling fluids
• Proven ability to troubleshoot complex mechanical and thermal systems in live operational environments
• Working knowledge of integrated mechanical, electrical, and control systems supporting high‑density compute
• Familiarity with NFPA, ASHRAE, and OSHA standards related to mission‑critical cooling infrastructure