5C DATA CENTERS
Join the Future of Digital Infrastructure
Are you a passionate
Senior Facility Engineer – Mechanical looking to make a meaningful impact? We're building the next generation of digital infrastructure powering hyperscalers, AI innovation, and high-performance computing across North America.
JOB TITLE
Senior Facility Engineer – Mechanical
DEPARTMENT
Engineering – Facility Reliability
LOCATION
Montreal, QC
WORK ARRANGEMENT
Hybrid
Travel Requirements
SALARY RANGE
Role Summary
5C is a full-stack AI digital infrastructure provider that designs, develops, and operates scalable AI factories and purpose-built data center campuses engineered for speed, density, reliability, sustainability, and long-term performance across North America.
As 5C's data center facilities transition from development into live operation, this role provides deep mechanical and cooling engineering authority for the operating portfolio. The Senior Facility Engineer – Mechanical is a senior technical anchor who owns the hardest live-site cooling and mechanical problems - from chilled water and air systems through liquid cooling for AI density - while mentoring engineers and setting the mechanical engineering bar for the function.
How We Work At 5C
Our core values guide how we collaborate, make decisions, support one another, and serve our customers. We're looking for people who embrace them and help us build something great.
What You Will Do
- Act as the primary mechanical engineering technical authority for operational facilities, providing expertise in chilled water systems, air handling systems, pumping systems, CRAH/CRAC units, heat rejection systems, and liquid cooling solutions designed for high-density AI environments.
- Lead root cause analyses, failure mode studies, and reliability assessments related to mechanical and cooling systems. Ensure the implementation, monitoring, and closure of corrective and preventive actions to maintain facility performance and resilience.
- Review and approve operational procedures (MOPs, SOPs, and EOPs) as well as high-risk interventions involving cooling systems, evaluating their impact on redundancy, capacity, and facility condition. Provide senior technical expertise during critical incidents, abnormal operating conditions, and major alarms, while participating in the L3/L4 technical escalation rotation.
- Represent the engineering team during design reviews, commissioning activities, Integrated Systems Testing (IST), and operational handovers. Identify single points of failure, redundancy losses, and thermal or capacity constraints; maintain technical documentation and control sequences; mentor engineers; and establish regional mechanical engineering technical standards.
What You Bring
- Bachelor's degree in Mechanical Engineering or a closely related engineering discipline.
- 6+ years in data centers, critical facilities, or mission-critical mechanical/cooling infrastructure.
- Strong command of chilled water and air systems, pumps, heat rejection, and data center cooling design.
- Ability to read and interpret mechanical drawings, control sequences, commissioning reports, and test data.
- Strong judgment, written communication, and the ability to remain calm and direct under pressure during live events.
Why Join 5C Data Centers?
At 5C, we believe great people build great companies. You'll build a rewarding career while helping shape the future of digital infrastructure - one of the fastest-growing industries in the world.
Career Growth
Build a rewarding career in one of the world's fastest-growing industries.
Industry Leadership
Help power the infrastructure behind AI and high-performance computing.
Entrepreneurial Culture
Your ideas matter - we empower employees to help shape our future.
Comprehensive Rewards
Competitive pay plus meaningful, lasting impact on the work you do.
Life at 5C
We're more than a workplace - we're a team of builders, innovators, and problem-solvers united by a shared purpose: creating infrastructure that powers the technologies transforming our world. Your voice matters here, and we encourage fresh ideas at every level.
Ready to Apply?
If this opportunity sounds like the right fit for you, we'd love to hear your story. Apply today and discover what your future could look like at 5C Data Centers.
5C Data Centers is an equal opportunity employer.
We celebrate diversity and are committed to creating an inclusive environment where everyone can thrive. 5C evaluates qualified applicants without regard to race, color, religion, gender, national origin, age, sexual orientation, gender identity or expression, disability status, or any other legally protected characteristic.
