Senior Field Service Technician

About the role

OptiCool's Delta4T™ two-phase liquid cooling platform removes heat at the rack using refrigerant-based rear door heat exchangers and pumped refrigerant loops that integrate to facility chilled water or outdoor DX heat rejection. As we scale deployments and service coverage, this role is the front-line technical expert responsible for safe, professional, high‑availability support in mission‑critical data centers. The position is field‑based (U.S.) with domestic and international travel (~40–65% of time, including occasional short‑notice travel and after‑hours work) and participation in a rotating 24/7 on‑call support schedule.

Responsibilities

• Field service execution (installation, commissioning, break/fix): perform on‑site installation support, start‑up/commissioning, verification testing, and turnover for OptiCool systems in Tier 3/4 and other mission‑critical environments.
• Diagnose and resolve mechanical, electrical, controls, and refrigerant‑side issues on OptiCool equipment (RPW/RPC pumps, RDHx doors, refrigerant distribution network, and ODX heat rejection where applicable).
• Execute emergency/break‑fix response and restoration activities in accordance with customer site rules, change management, and OptiCool service standards.
• Perform refrigerant best practices: evacuation, dehydration, pressure/leak testing, charging/recovery, and contamination control; document all work performed and readings captured.
• Preventive maintenance, inspections, and reliability improvements: execute formal preventive maintenance visits; perform standardized inspections/audits, record results, and propose corrective actions.
• Identify pattern failures and recurring issues; provide actionable feedback to Engineering/Manufacturing for design‑for‑service and reliability improvements.
• Support development of PM kits, field‑ready spares recommendations, and service bulletins.
• Remote support, monitoring, and documentation discipline: provide phone/remote triage and troubleshooting; support 24/7 escalation as part of the on‑call rotation.
• Support BMS/monitoring integration troubleshooting (e.g., Modbus/BACnet/SNMP where applicable) and interpret alarms, logs, and trend data to drive proactive interventions.
• Complete accurate service documentation: reports, photos, as‑found/as‑left readings, test records, and closeout notes suitable for customer and internal engineering use.
• Customer, contractor, and partner enablement: deliver customer and partner training (in person and remotely); coach site teams on safe operations and basic troubleshooting.
• Help build and maintain OptiCool's contractor/partner network by reinforcing workmanship and documentation standards and serving as a technical mentor.
• Maintain professional appearance and conduct as an OptiCool representative on customer sites.
• Cross‑functional support (lab/manufacturing interface): support factory/startup verification to ensure systems ship ready for the field; assist with troubleshooting and validation testing as needed.
• Assist Engineering with test setups, data collection, and evaluation of new and legacy equipment when required.

Qualifications

Required:

• 7+ years of progressive field service experience in HVAC/R, mission‑critical cooling, or closely related equipment service.
• EPA Section 608 Universal (or ability to obtain within 60 days) and strong refrigerant‑side fundamentals (leak testing, evacuation, charging/re