About STACK
STACK INFRASTRUCTURE (STACK) is an award-winning industry leader in building, owning, and operating highly efficient, cost-effective wholesale, colocation, and cloud data centers. We provide digital infrastructure that enables the world’s most innovative companies to scale, with facilities that meet or exceed the highest industry standards for availability, security, connectivity, and physical resilience.
As a well-established data center business across APAC, the Americas, and Europe, STACK has successfully built several data centers in Melbourne and continues to expand its project portfolio with the goal of becoming a market leader in the hyperscale data center market.
STACK offers the scale and geographic reach that rapidly growing hyperscale and enterprise companies need. The world runs on data, Data runs on STACK.
Summary/Objective
The Senior Critical Operations Technician provides 24×7×365 operational coverage to support continuous, safe and reliable performance of critical electrical, mechanical, cooling, controls and life-safety systems across the data centre. The role performs hands-on operational maintenance, system monitoring, first-response troubleshooting, incident support and contractor coordination to uphold STACK’s 100% uptime commitment. Technicians operate and monitor facility infrastructure across power and cooling paths within approved procedures and role-specific authorisations, while maintaining a concierge-level customer service approach in all stakeholder interactions.
Essential Functions – Critical Operations
- Maintain 24×7×365 shift coverage, ensuring safe and stable operation of all critical infrastructure systems.
- Operate and monitor critical electrical and/or mechanical systems (based on background, training and authorisation) including UPS, PDUs, switchboards, generators, CDU/FWU/CRAC/CRAH units, chilled water systems, pumps and associated plant—strictly within approved operating procedures.
- Perform hands-on operational maintenance within authorised scope, including inspections, condition monitoring, equipment resets, minor adjustments and component-level replacements (non-licenced work).
- Identify abnormal conditions, complete initial diagnostics, implement first-level rectification actions where authorised, and escalate promptly to the Senior Data Centre Specialist.
- Respond to alarms and operational incidents, supporting containment, investigation, communication and restoration activities.
- Use BMS/EPMS and monitoring platforms to track alarms, interpret trends and support performance optimisation within approved limits.
- Complete structured rounds including meter readings, thermal/capacity checks and condition observations, recording findings accurately.
- Coordinate and supervise licenced contractors performing trade-restricted works, ensuring compliance with permits, LOTO and site safety requirements.
- Support planned maintenance, shutdowns, testing and return-to-service activities through operational tasks, witnessing and verification.
- Maintain accurate shift logs, event records, handover notes and CMMS updates to ensure full operational traceability.
- Proactively identify and report reliability risks and improvement opportunities to support STACK’s 100% uptime commitment.
- Participate in incident management training and exercises, acting as a trained first responder under direction of incident leaders.
- Contribute to continuous improvement of SOPs, MOPs, EOPs, risk assessments and operational readiness activities.
- Provide professional, timely communication to customers and stakeholders to support a high-quality service experience.
- This role does not perform licenced electrical, mechanical or refrigeration work. All trade-restricted activities are undertaken by appropriately qualified contractors or licenced personnel. The role focuses on operational system management, first-response troubleshooting, vendor coordination and component-level maintenance within authorised limits.
People
- Set a high standard for safety behaviour, operational discipline and professional conduct across the shift.
- Support technicians through on-the-job coaching, demonstrations and constructive feedback to improve capability and consistency.
- Assist with onboarding and familiarisation of new team members, reinforcing authorised boundaries and operational expectations.
- Strengthen team communication by ensuring clear handovers, accurate escalation details and calm coordination during events.
- Participate actively in briefings, toolbox talks, training and operational discussions, offering practical observations and improvement ideas.
- Build collaborative relationships with Security, Projects and vendor personnel to support safe, coordinated site operations.
- Demonstrate a concierge‑level customer service approach in all interactions with customers, visitors and stakeholders.
Competencies
- Operational discipline with a strong focus on safety, risk control and reliability
- Ability to operate critical electrical and/or mechanical systems within procedural and authorisation boundaries
- Effective troubleshooting, root-cause thinking and first-response decision-making under pressure
- Ability to interpret alarms, trends and technical documentation (SLDs, O&M manuals, procedures)
- Proficient in digital operational systems (BMS/EPMS, CMMS, workflow platforms) and reporting tools
- Strong communication skills and calm, structured incident support
- Contractor coordination capability with sound permit-to-work and LOTO awareness
- Customer-focused, professional service orientation
- Collaborative team behaviour with personal accountability and consistency on shift
- Continuous improvement approach (procedures, logs, risk reduction and operational uplift)
Preferred Education and Experience
- 2-3 years’ experience in critical environments such as data centres, hospitals, utilities, defence, industrial plants or similar operational settings.
- Demonstrated capability operating and/or monitoring electrical and/or mechanical infrastructure (e.g., UPS, generators, switchgear, PDUs/PMMs, ATS/STS, CRAC/CRAH, chilled water systems, pumps, fire systems and controls).
- Hands-on experience performing operational maintenance and first-level rectification activities within authorised limits.
- Experience using BMS/EPMS and CMMS/workflow tools to manage alarms, work orders and operational documentation.
- Ability to interpret technical drawings and documentation (including single-line diagrams and O&M manuals).
- Familiarity with permit-to-work, LOTO and basic risk assessment principles.
- Strong written and verbal communication skills suitable for shift logs, incident updates and customer/stakeholder engagement.
Work Environment/Conditions
- 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 as per site policy.
- Participation in emergency response activities and incident exercises is required.
Work Authorization/Security Clearance Requirements
- Legal entitlement to work in Australia.
- Ability to satisfy pre-employment screening requirements (as applicable), 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.
- Security clearance is not required unless specified for a customer-specific facility.
Equal Opportunity Employer
STACK provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.
This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.
