Lead Critical Facilities Technician; Liquid Cooling

Job Description

As the Lead Critical Facilities Technician (Liquid Cooling), you will provide technical leadership, training, and escalation support for Data Center and Field Service Technicians. This role serves as the onsite subject matter expert for liquid-cooled infrastructure, coordinating deployments, supporting operational readiness, and ensuring quality and safety standards are met. The Lead Technician oversees the design, integration, deployment, commissioning, and support of high-density AI and HPC infrastructure, including environments exceeding 30kW-100kW+ per rack.

Working across Operations, Engineering, and Facilities teams, this position supports Direct Liquid Cooling (DLC), Rear Door Heat Exchangers (RDHx), and Coolant Distribution Units (CDUs), helping optimize thermal performance, reliability, and energy efficiency while providing guidance and mentorship to technicians during installation, maintenance, and troubleshooting activities.

• Design and integrate custom liquid-cooled racks, including manifolds, piping, fluid couplings, and secondary cooling loops tied to facility chilled-water systems through CDUs
• Integrate and validate Building Management System (BMS) sensors, controls, and monitoring hardware to ensure accurate telemetry for coolant flow, temperature, pressure, and rack-level thermal performance.
• If you want a slightly different flavor, here are two alternates depending on how deep you want to go:
• Deploy and support RDHx and direct-to-chip cold-plate systems, ensuring proper thermal performance, pressure balance, and coolant flow rates
• Implement and maintain leak‑detection systems, drip trays, coolant chemistry controls, and material compatibility standards to protect IT equipment
• Oversee installation of CDUs, piping, and high‑density rack infrastructure in coordination with mechanical contractors and facilities engineering teams
• Lead daily activities of Data Center Technicians and Field Service Technicians, providing work direction, technical guidance, and escalation support.
• Assign, prioritize, and coordinate installation, commissioning, maintenance, and break‑fix activities to ensure project milestones and operational objectives are achieved.
• Serve as the primary technical lead and subject matter expert for liquid‑cooling infrastructure, supporting technicians and customers through complex installations and troubleshooting efforts.
• Serve as the liaison between data center technicians, engineering, technical services, and quality assurance teams, ensuring alignment with operational standards
• Mentor, train, and develop technicians on liquid‑cooling technologies, operational procedures, safety practices, and quality standards.
• Lead commissioning activities, operational readiness reviews, and quality assurance processes for liquid‑cooled deployments.
• Coordinate, schedule, and provide work direction to field service technicians while maintaining safety, quality, and productivity expectations
• Perform quality checks, documentation updates, and operational reviews for all liquid‑cooling and high‑density rack deployments
• Review and validate completed work to ensure compliance with engineering specifications, deployment standards, and customer requirements.
• Conduct regular physical and visual inspections of liquid‑cooled systems, racks, and facility infrastructure to identify risks or performance issues
• Support installations, moves, additions, and changes involving high‑density GPU/CPU servers, networking equipment, and power systems
• Maintain logs, tracking forms, and documentation related to cooling systems, rack builds, and project execution
• Manage capacity planning for space, power, cooling, and port availability within liquid‑cooled environments
• Follow…