Location: [Toronto, ON / Regina, SK]

Employment type: Full-time

Travel: 30–60%, depending on project requirements

Reports to: Lead Commissioning Project Manager

About Mission Critical EngineersMission Critical Engineers is a specialist independent Commissioning Authority for data centres and other high-availability infrastructure. We represent owners through the full commissioning lifecycle, providing rigorous technical oversight from design and construction verification through functional testing, integrated systems testing, and operational handover.

Our work addresses the complete critical infrastructure stack: electrical distribution, standby generation, UPS and battery systems, air and liquid cooling, BMS and controls, fire suppression, and life-safety systems. We are engaged where performance, redundancy, maintainability, and operational reliability must be demonstrated—not assumed.

The OpportunityMission Critical Engineers is seeking a Mechanical Commissioning Associate to support commissioning delivery on complex data centre and mission-critical projects.

This is a field-based technical role involving construction verification, test execution, documentation, and coordination with project stakeholders. Working under the direction of the Lead Commissioning Project Manager, the Mechanical Commissioning Associate will verify that mechanical systems are installed, controlled, tested, and documented in accordance with the Owner’s Project Requirements, Basis of Design, specifications, and operating sequences.

Responsibilities





- Support mechanical commissioning activities for data centres and mission-critical facilities.
- Participate in L1–L5 commissioning, including factory acceptance testing, installation verification, pre-functional testing, functional performance testing, and integrated systems testing.
- Review mechanical drawings, specifications, submittals, equipment documentation, test procedures, control sequences, and operating manuals.
- Conduct site inspections and verify system installation and test readiness.
- Assist in commissioning cooling systems, including chillers, cooling towers, pumps, CRAH/CRAC units, air-handling units, CDUs, heat exchangers, liquid cooling systems, piping networks, and associated controls.
- Support testing of BMS, controls, alarms, monitoring points, interlocks, failure modes, and sequence-of-operations performance.
- Coordinate with contractors, OEM representatives, owners, and engineers during commissioning and testing activities.
- Record test results, site observations, deficiencies, corrective actions, and commissioning progress.
- Prepare meeting minutes, test reports, deficiency logs, and project status updates.
- Support test-readiness reviews, project schedules, site coordination,



and test-day logistics.
- Follow MCE and project safety requirements at all times.
- Travel to client and project sites across Canada, as required.

Qualifications
- Diploma or bachelor’s degree in Mechanical Engineering, Mechanical Engineering Technology, Building Systems Engineering, or a related discipline.
- Experience in mechanical construction, testing, commissioning, design, operations, or maintenance is preferred.
- Foundational understanding of HVAC, hydronic, cooling, and control systems.
- Ability to read and interpret mechanical drawings, P&IDs;, control diagrams, specifications, and equipment manuals.
- Solid attention to detail, organization, and technical documentation skills.
- Strong written and verbal communication skills.
- Proficiency with Microsoft Office.
- Ability to work safely in active construction and mission-critical environments.
- Valid driver’s licence and ability to travel 30–60% as required.

Preferred Qualifications
- Experience in data centres, healthcare, industrial, laboratory, or other mission-critical environments.
- Experience with chilled-water systems, cooling towers, CRAH/CRAC systems, liquid cooling, BMS, or data centre cooling infrastructure.
- EIT, C.E.T., or eligibility for professional registration.
- Familiarity with commissioning processes and L1–L5 testing.

Mission Critical Engineers is an equal-opportunity employer. Accommodations are available throughout the recruitment process in accordance with applicable law.

📌 Mechanical Commissioning Associate — Data Centres (Toronto)
🏢 Mission Critical Engineers | Mission Critical Forensics
📍 Toronto