At LiquidStack, 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.
**Ideal candidates will be located near major customer hubs, with a preference for candidates based in Atlanta, GA (supporting Southeast/East Coast coverage) or Denver, CO (supporting Mountain/West Coast coverage).
POSITION SUMMARY
LiquidStack 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; LiquidStack provides product-specific orientation but no foundational trade, certification, or technical-skills training outside of required safety programs.
ESSENTIAL DUTIES AND RESPONSIBILITIES
Field Execution & Technical Ownership
- Lead on-site installation, startup, commissioning, validation, preventive maintenance, and corrective service of LiquidStack 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
Customer & Site Leadership
- Act as LiquidStack'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
Documentation, Quality & Continuous Improvement
- 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., ServiceNow, 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
Mentorship & Scaling Support
- Train junior FST's and customer -side data center technicians on LiquidStack 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
SPECIFIC KNOWLEDGE, SKILLS, AND ABILITIES
- 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
- High school diploma or GED require
- Valid driver's license and passport
- Willingness to travel approximately 75% (primarily domestic with occasional international travel)
- EPA 608 Universal Certification (Types I, II, and III) required at offer to legally service the full pressure range, including low-pressure chillers, without supervision
- OSHA 10 (General Industry) required; OSHA 30 and NFPA 70E (arc flash) strongly preferred and may be required by customer sites before performing energized electrical work
- Lockout/tagout (LOTO) competency required for safe servicing of energized mechanical and electrical systems in live data centers
- Ability to read and work from electrical schematics, P&IDs, mechanical drawings, and sequence-of-operations documents without supervision
- Working knowledge of hydronic loops, pumps, heat exchangers, CDUs (coolant distribution units), manifolds, and pressure/flow control
- Familiarity with data center infrastructure: UPS, PDU, generators, ATS, BMS/DCIM, CRAC/CRAH, fire suppression, and raised floor or slab environments
- Strong verbal and written communication; able to brief customers, peer technicians, engineers, and managers at the appropriate technical depth, remain calm during critical events, conduct customer handovers, and deliver operational training
- Willingness to participate in 24x7 on-call rotation and respond to critical infrastructure emergencies
**Ideal candidates will be located near major customer hubs, with a preference for candidates based in Atlanta, GA (supporting Southeast/East Coast coverage) or Denver, CO (supporting Mountain/West Coast coverage).
Preferred
- Experience supporting data centers, hyperscale facilities, or other high‑availability environments
- Hands-on experience with high-density liquid cooling (direct-to-chip, immersion, rear-door heat exchangers, manifold-based distribution)
- Prior experience with hyperscale, colocation, or enterprise data center operators (e.g., Equinix, Digital Realty, Flexential, CoreSite, Compass, QTS); NOC/SOC/IOC or DCT II/III experience a plus
Work Environment & Physical Requirements
- Work performed at customer data centers, mechanical rooms, and industrial environments; extended hours, nights, or weekends during commissioning or critical events
- Ability to push or carry up to 75lbs. with assistance; routine bending, squatting, kneeling, and overhead reaching ; climbing ladders and elevated platforms; reliable transportation; on-call rotation; adherence to customer site safety, and PPE protocols at all times
Why Join Us?
- Competitive pay with opportunities for overtime
- Consistent day-shift schedule
- Paid time off, holidays, and great benefits
- Be part of an industry-disrupting company with room to grow
- Work on innovative technologies in a collaborative, supportive environment
