Building Automation, Critical Environments, Cross-Functional Teamwork, Data Center Support, Electrical Maintenance, Equipment Maintenance, Facility Engineering, Facility Maintenance, Facility Management, HVAC Repair, HVAC Systems, Plumbing, Problem Solving. The Critical Facilities Engineer is part of the Facility Operations team, responsible for performing preventative and ongoing maintenance of mechanical, electrical, plumbing, and other infrastructure systems in mission-critical, high-risk, or high-reliability environments (e.g., data centers, medical facilities, laboratories, or utilities infrastructure).