Critical Operations Technician

THE COMPANY:
STACK INFRASTRUCTURE (STACK) provides digital infrastructure to scale the world's most innovative companies. We are an award-winning industry leader in building, owning, and operating highly efficient, cost-effective wholesale, colocation, and cloud data centers. Each of our national facilities meets or exceeds the highest industry standards in all operational categories of availability, security, connectivity, and physical resilience.

STACK offers the scale and geographic reach that rapidly growing hyperscale and enterprise companies need. The world runs on data. Data runs on STACK.

THE POSITION:
STACK is looking for a Critical Operations Technician (COT) to support a local data center campus. As a member of STACK's Critical Operations team, the Critical Operations Technician must possess strong knowledge in maintaining the mechanical, electrical, fire life safety, base building, and other various internal data center systems. The COT will also be focused on the execution of programs related to Safety, Team, Availability, Communication, and Knowledge. The COT will be responsible for day-to-day operations of the data center.

Mechanical responsibilities will include maintaining and repairing chilled water systems and components, HVAC systems such as roof top units, CRAC/CRAH units, humidification systems, fan wall systems, air-cooled chillers, and central plant operations. Electrical responsibilities will include maintaining and repairing electrical/critical power distribution from the Utility/Generator main switchgear through the UPS systems out to the customer load, UPS, PDU, and RPP cabinets. Fire Life Safety responsibilities will include monitoring wet sprinkler systems and pre-action sprinkler systems as well as their associated detection devices.

• Implement and follow the standardized culture of always working safely across all STACK data centers.
• Operate, monitor, maintain, and respond to abnormal conditions in facilities systems. Areas include Electrical, Mechanical, Building Monitoring, and Control.
• Tracking and trending operational characteristics.
• Provide feedback to management on the effectiveness of existing standards and processes
• Work with operations team to complete an aggressive preventive and predictive maintenance schedule
• Identify and document maintenance discrepancies and work with site management to resolve site issues based on agreed-upon priorities.
• Ensure data center operates at maximum operational efficiency by analyzing existing operating conditions, identifying areas if optimization, and working with site management to implement efficiency improvements.
• Manage systems to avoid unplanned, customer-impacting outages
• Coordinate and oversee power installations and upgrades.
• Utilize a CMMS system to manage and document maintenance and repair of data center systems.
• Use developed policies and procedures to guide and preform work.
• Use developed procedures to solve problems
• Assist in asset and consumable inventory management.
• Responsible for tracking and proper labeling of all equipment per established procedures.
• Provide day-to-day exceptional customer service and support.
• Incident escalation, response, and follow-up report writing
• Maintain and complete regular facility and security tours documenting and responding to identified issues.
• Provide applied mechanical and integrated control expertise for the entire data center
• Serve in a technical writing capacity to write and modify procedures for preventative or corrective maintenance activities

PLEASE NOTE:

• Work hours may vary based upon business needs.
• Other duties as required by STACK. Job duties, roles, and responsibilities are subject to change over time.

THE DETAILS:

• Location: Toronto, ON
• Travel: None or less than 5%
• Benefits: Healthcare, Dental Care, Vision Insurance, Life Insurance, Paid Time Off, Paid Leave Programs
• Must be eligible to work in Canada
• Must pass a comprehensive background screening

MUST-HAVE QUALIFICATIONS:

• High school diploma or equivalent
• Minimum of 1-3 years experience in a data center or other related mission-critical operations role.
• Experience working with various Microsoft Office applications and other database housing software
• Ability to handle a multitude of tasks and work well in stressful situations.
• General understanding of the electrical and mechanical systems used in a data center environment. These include, but are not limited to UPS, Transformers, PDU's, RPP's, Chillers, CRAH, CRAC, STS, ATS, and Pre-action systems
• Strong knowledge of NFPA70e, NFPA72, NFPA25, and compliance issues as well as building codes in regard to fire life safety.
• Familiarity and experience in data center trending and analysis, with the ability to rapidly learn and use PC-based site monitoring systems.
• Bachelor's Degree or equivalent work experience – preferred
• While performing the duties of this job, the employee is occasionally required to stand, walk, sit, use hands to handle, reach or feel objects, climb stairs, balance, stoop or kneel, talk, see at close range, and hear for extended periods of time
• Must be able to lift and/or move up to 25 pounds.
• Must be willing to work outside normal business hours, including weekends, nights, holidays, and on-call support.
• Must be comfortable working in a high stress, fast paced environment with shifting priorities

THIS MIGHT BE RIGHT FOR YOU IF:

• You are a strong communicator, you are persuasive and clear, blending analytics with experience in decision-making.
• You do not get flustered easily. You can juggle multiple priorities while balancing urgent requests with shifting timelines and deliverables.
• You are a team builder. You take the time to understand and develop the strengths of your resources while formulating long-term plans for the growth and success of the team.
• You are naturally curious and driven toward continual improvement. While you celebrate your successes, you take time to review and analyze campaigns for future learning.

WHY STACK?

• We offer a competitive compensation package with strong benefits, including medical, dental, and vision insurance, a 401K program, flexible spending accounts – even a cell phone subsidy.
• We foster a culture of appreciation, including peer-to-peer recognition and rewards programs.
• Fun is part of our DNA, with events, game nights, happy hours, and barbecues.
• We're growing – this is a great time to join and make an impact

Application deadline: November 30, 2025
STACK is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity and expression, age, national origin, mental or physical disability, genetic information, veteran status, or any other status protected by federal, state, or local law.
Note to external agencies:
we are not accepting any blind submissions or resumes/cvs from recruitment agencies. Any candidates sent to STACK Infrastructure will not be accepted or considered as a submission without a signed agreement in place.
Job ID: 10178