Senior Lead Field Services Technician

At Liquid Stack, we’re redefining what’s possible in the data center world. As a global leader in advanced liquid cooling solutions, we’re powering the future of AI, edge computing, and high-performance systems. Our team is growing, and we’re looking for skilled professionals who want to be part of something innovative and impactful.

Liquid Stack is a fast-growing technology company delivering advanced liquid cooling solutions for mission‑critical data center and high‑performance computing environments. We are seeking a Senior Field Service Technician to serve as a technical owner in the field—leading complex installations, startups, and commissioning activities while acting as a trusted technical partner to customers.

This highly visible, hands‑on role goes beyond break/fix service. The Senior FST independently executes complex field work, mentors junior technicians, and serves as on‑site technical authority during installations, commissioning, outages, and critical events. The successful candidate arrives fully credentialed and ready on day one;
Liquid Stack provides product‑specific orientation but no foundational trade, certification, or technical‑skills training outside of required safety programs.

• Lead on‑site installation, startup, commissioning, validation, preventive maintenance, and corrective service of Liquid Stack liquid cooling systems; serve as the primary technical escalation point in the field prior to Engineering involvement
• Support emergency response, outages, and time‑sensitive customer events when required
• Perform advanced troubleshooting across mechanical, hydronic, electrical, controls, and thermal subsystems; isolate root cause across hardware, software, power, fluid quality, or environmental factors
• Operate diagnostic instrumentation (multimeters, megohmmeters, manometers, IR cameras, refrigerant recovery, flow meters, pressure transducers); lead pressure testing, flow balancing, fluid fills, leak checks, and acceptance testing during commissioning
• Read and work from electrical schematics, P&IDs, mechanical drawings, and sequence‑of‑operations documents; redline drawings when as‑built conditions differ from design
• Coordinate work within mission‑critical 24x7 data center environments including UPS, PDU, generators, ATS, BMS/DCIM, CRAC/CRAH, fire suppression, and chilled‑water plant; adhere to badge access, escort, change‑control, and chain‑of‑custody policies at every customer site
• Act as Liquid Stack’s senior technical representative at customer sites; communicate clearly and calmly with customer IT, facilities, engineering, and management stakeholders at the appropriate level of detail, especially during critical infrastructure events
• Support customer acceptance testing and formal system handover
• Deliver basic operational training and system overviews to customer technical teams; field technical questions and represent product capability accurately

• Complete detailed service reports, commissioning documentation, and root‑cause analyses
• Partner with Engineering, Manufacturing, Quality and Supply Chain to resolve recurring field issues; contribute to service procedures, checklist, and training materials
• Use service ticketing systems (e.g., Service Now, Salesforce Field Service, or equivalent) to track work, log time against tasks, document resolutions, and ensure timely closure; maintain SLA compliance and clean shift handoffs to ensure continuity of operations
• Train junior FST's and customer‑side data center technicians on Liquid Stack equipment, troubleshooting, and best practices; lead pre‑job briefing, JSAs, and post‑job debriefs; serve as on‑site escalation point during complex troubleshooting; communicate status, blockers, and lessons learned across the service team

• 5+ years of field service experience supporting HVAC, HVAC R, chillers, industrial cooling, power, or mission critical infrastructure
• Proven experience leading equipment startups, commissioning, and troubleshooting in customer environment
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