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Assistant Critical Operations Manager

stackinfra · Elk Grove Village, IL · United States · On-site

Posted Sep 29, 2026

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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 an Assistant Critical Operations Manager (ACOM) to support a local data center campus. As a leader in STACK’s Critical Operations team, the ACOM must possess an expert level of knowledge and will be responsible for assisting the Critical Operations Manager in maintaining the mechanical, electrical, fire life safety, base building, and other various internal data center systems. The ACOM will also be focused on the implementation of programs related to Safety, Team, Availability, Communication, and Knowledge. The Assistant Critical Operations Manager will report to the Critical Operations Manager. The ACOM is responsible for the implementation of the Data Center Operations Program at their site and is responsible for employee training and ensuring all staff is adequately qualified to perform their duties. Holding regular team meetings and individual 1:1 sessions is required. The ACOM will assist the Critical Operations Manager in developing and maintaining CAPEX and OPEX budgets at the site level. They will also be responsible for project execution and management including developing scopes, obtaining proposals, creating purchase requisitions, and ensuring invoices are routed properly. Responsibilities include but are not limited to: Lead and implement a standardized culture of always working safely across all STACK data centers. Serve as a datacenter subject matter expert for electrical, mechanical, fire life safety, and other data center systems. Operate, monitor, maintain, and respond to abnormal conditions within the facility. Implement site-level efficiency projects and maintain overall site design PUE. Ensure STACK preventative and predictive maintenance program is executed. Train and mentor junior staff. Manage vendor relationships and service contracts. Assist in managing vendor procurement and billing processes. Support site budgeting and forecasting for both CapEx and OpEx. Create highly detailed technical procedures for maintenance events, emergency situations, and standard site evolutions. Perform expert technical review of procedures, company standards, and policies. Manage site audits, both internal and external, ensuring adherence to compliance standards. Manage systems to avoid unplanned, customer-impacting outages. Manage the data floor and back-of-house mechanical…