BAS Controls Mission Critical Service Technician

Liberty Personnel Services, Inc.; San Antonio (TX); On-site; USD 65,000 - 90,000; Full time

Job summary

Liberty Personnel Services, Inc. is seeking a field-based technician to maintain data center controls and automation systems for a leading HVAC manufacturer’s rep network in North America.

Responsibilities include preventive and corrective maintenance on BAS/BMS controllers, power-monitoring interfaces, and related field panels; perform point-to-point validation and support startup and turnover activities; work within safety protocols and change-management processes.

Qualifications

• Experience maintaining BAS/BMS and data center controls.
• Strong troubleshooting and diagnostic skills on control systems.
• Knowledge of electrical safety and field service protocols.

Responsibilities

• Perform preventive and corrective maintenance on data center controls and automation systems.
• Maintain BAS/BMS controllers and field panels.
• Validate sensors, alarms, trend logs and sequence-of-operation logic.
• Execute work using approved MOPs/SOPs/EOPs and change-management processes.
• Support alarm response, degraded performance investigations, and outages per SLA.

Skills

BAS/BMS maintenance

Data center controls

Electrical safety

Troubleshooting

Field service

Job description

My client is the largest independent commercial HVAC manufacturers’ rep in North America , with 20 locations in the US and Canada. You would become part of the best team in Commercial HVAC, Refrigeration, and of course, BMS and Industrial Controls.

Key Responsibilities

• Perform preventive and corrective maintenance on data center controls and automation systems, including but not limited to:
• BAS/BMS controllers and field panels.
• EPMS and power-monitoring interface points.
• DCIM-adjacent monitoring and integration points.
• Control panels, relays, terminal blocks, low-voltage wiring, and communication modules.
• Temperature, humidity, differential pressure, static pressure, airflow, leak detection, and equipment status sensors.
• CRAH/CRAC, AHU/RTU, fan wall, chilled water, pump, cooling tower, adiabatic, and liquid-cooling control interfaces.
• UPS, generator, ATS/STS, switchgear, PDU, RPP, and electrical monitoring points where applicable.
• Alarm points, trend logs, graphics, setpoints, schedules, and sequence-of-operation logic.
• Execute work through the approved field management system using approved. MOPs, SOPs, EOPs, and change-management processes.
• Maintain awareness of redundancy, upstream/downstream impacts, stacked risk, and potential consequences of controls changes.
• Support alarm response, degraded performance investigations, sensor failures, communication loss, control-loop instability, and emergency service calls per SLA.
• Perform point-to-point verification, sensor validation, command/feedback checks, trend review, and controls readiness inspections.
• Support startup, functional testing, integrated systems testing, and turnover activities as assigned.
• Document work performed, readings, screenshots, trends, deficiencies, alarms, corrective actions, and system conditions accurately.
• Follow strict safety protocols, including LOTO, PPE, low-voltage electrical safety, site access rules, tool control, and live-site restrictions.
• Participate in scheduled maintenance windows, on-call rotations, after-hours response, and outage-support activities.
• Complete required company, data center, controls, OEM, and mission-critical training.