Facilities HVAC Technician IV - Senior Lead

Career Opportunities with Firefly Aerospace

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Firefly Aerospace is a space and defense technology company on a mission to reliably and repeatedly launch, land, and operate space systems from Earth to the Moon and beyond. As the partner of choice for critical space missions, Firefly is the first commercial company to launch a satellite to orbit with 24-hour notice and the first company to achieve a successful Moon landing.

Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space.

The Facilities HVAC Technician IV – Senior Lead is a hands‑on technical leadership role responsible for the reliability, troubleshooting, maintenance, commissioning, and continuous improvement of mission‑critical HVAC and mechanical systems across Firefly’s Texas facilities.

This position serves as the senior technical escalation point for complex HVAC, refrigeration, controls, BAS, and environmental system issues. The Technician IV provides technical guidance and mentorship to HVAC Technicians I–III, leads complex troubleshooting and root cause corrective actions, and supports maintenance, reliability, projects, commissioning, and contractor oversight.

• Serve as the senior technical resource for complex HVAC and mechanical system failures.
• Provide technical direction, mentoring, and hands‑on training to HVAC Technicians I–III.
• Troubleshoot, repair, maintain, install, and optimize commercial and industrial HVAC systems ranging from approximately 5 to 100+ tons.
• Support RTUs, split systems, package units, air handlers, chillers, exhaust, make‑up air, dehumidification, humidification, and process cooling systems.
• Troubleshoot HVAC electrical systems, refrigeration circuits, VFDs, sensors, actuators, controls, and BAS.
• Support controlled environments, including production, test, laboratory, and clean‑room spaces.
• Lead Root Cause Analysis/Root Cause Corrective Action (RCA/RCCA) for significant or recurring failures and drive permanent corrective actions.
• Support preventive and predictive maintenance programs, equipment criticality assessments, reliability improvements, and spare‑parts planning.
• Provide technical oversight for HVAC installations, replacements, retrofits, capital projects, commissioning, and equipment acceptance.
• Oversee contractors, OEM technicians, controls vendors, and mechanical service providers.
• Maintain accurate CMMS documentation, work orders, equipment histories, and corrective‑action records.
• Ensure compliance with Firefly safety requirements and applicable OSHA, EPA, mechanical, electrical, and refrigeration standards.
• Participate in HVAC on‑call rotation and provide senior technical support during critical after‑hours failures.
• Communicate equipment risks, failures, restoration timelines, and corrective actions to Facilities leadership.

• 12+ years of progressive commercial or industrial HVAC experience, or equivalent education and experience.
• Extensive hands‑on experience troubleshooting and maintaining commercial/industrial HVAC systems.
• Advanced experience with HVAC systems ranging from approximately 5 to 100+ tons.
• Strong knowledge of refrigeration, airflow, psychrometrics, electrical systems, controls, and HVAC sequences of operation.
• Ability to troubleshoot mechanical, refrigeration, electrical, and control failures using schematics, meters, gauges, BAS data, and diagnostic equipment.
• Demonstrated…