Senior Critical Operations Technician (Australia)

STACK Infrastructure builds, owns, and operates hyperscale and colocation data centers. The Senior Critical Operations Technician is the senior on-shift technical role responsible for ensuring safe, stable and consistent operation of critical electrical, mechanical, cooling, controls and life-safety systems. The role provides elevated technical capability, supports first-response incident actions, verifies plant condition after maintenance or resets and guides technicians in executing operational tasks with accuracy and discipline. The role operates on a 24/7 rotating shift roster, including nights, weekends and public holidays. Work occurs in data halls, plant rooms, electrical/mechanical spaces and external plant areas; PPE is required under site policy. Minimal travel expected. This role does not perform licensed electrical, mechanical or refrigeration work.

Responsibilities

Support 100% uptime objective through disciplined operational control, proactive monitoring and accurate technical response; Maintain real-time awareness of plant condition through BMS/EPMS, alarms and inspections; Provide senior technical support to shift technicians; Operate and monitor critical electrical and/or mechanical systems, including UPS, PDUs, switchboards, generators, CRAC/CRAH, CDU/FWU, chilled water systems and pumps; Perform structured diagnostics on abnormal conditions and escalate with clear technical detail; Support operational event response, including containment actions and accurate event documentation; Conduct enhanced rounds, including thermal, capacity, vibration/noise, leak-detection and set-point verification; Identify trends, weak signals and reliability concerns and recommend preventive actions; Manage on-shift work execution with strict adherence to permit-to-work, isolations/LOTO and vendor access controls; Coordinate vendor activities during shift and verify return-to-service; Validate operational readiness following maintenance, resets or configuration changes; Review and improve shift logs, event notes, CMMS entries and handovers; Raise and escalate recurring defects and reliability risks; Contribute to procedure reviews, readiness activities, drills and documentation improvements; Set a high standard for safety behaviour and professional conduct across the shift; Support technicians through on-the-job coaching and feedback; Assist with onboarding of new team members; Build collaborative relationships with Security, Projects and vendor personnel; Participate in emergency response activities and incident exercises

Requirements

Experience in critical environments such as data centres, hospitals, utilities, Defence or industrial facilities; Demonstrated capability operating and monitoring critical power and cooling systems, including UPS, generators, switchgear, PDUs/PMMs, ATS/STS, CRAC/CRAH, chilled water systems, pumps, controls and fire systems; Hands-on experience conducting operational inspections and first-response stabilisation actions; Experience using BMS/EPMS and CMMS/workflow tools for monitoring, work management and operational documentation; Ability to read and interpret single-line diagrams, technical drawings and OEM documentation; Familiarity with permit-to-work, isolations/LOTO and basic operational risk assessment; Strong written and verbal communication suitable for logs, handovers and customer-facing updates; Completion of STACK onboarding and required safety/compliance training; Ability to meet site authorisation requirements for system operation and system access; Physical capability to perform inspections, rounds and emergency response tasks; Ongoing compliance with STACK policies, procedures and behavioural standards; Legal entitlement to work in Australia; Ability to satisfy pre-employment screening requirements, including right-to-work checks, background checks and reference checks; Ability to meet data centre security requirements, including badging, access control and adherence to customer-mandated security protocols

Nice to have

Experience in critical environments such as data centres, hospitals, utilities, Defence or industrial facilities; Ability to read and interpret single-line diagrams, technical drawings and OEM documentation; Familiarity with permit-to-work, isolations/LOTO and basic operational risk assessment