Critical Environment Ops Supervisor

JLL; Milwaukee (WI); On-site; USD 90,000 - 130,000; Full time

Job summary

JLL in Milwaukee is seeking a US Critical Environments Operations Supervisor to oversee mission-critical engineering services across designated facilities, ensuring 24/7/365 reliability of UPS, generators, HVAC, PDUs, and building automation systems.

You will coordinate daily activities across data centers, trading floors and other critical spaces, lead a team of engineers, manage vendor contracts, and help drive continuous improvement toward 100% uptime while optimizing safety and cost.

Qualifications

• Experience in managing mission-critical environments.
• Ability to coordinate cross-functional teams and vendors.
• Proven track record delivering high-availability operations.

Responsibilities

• Provide direct operational support to CE Ops Manager across assigned facilities.
• Coordinate with CE management, client teams, and engineering groups to maintain infrastructure availability.
• Monitor and respond to critical alarms and incidents; ensure 24/7 uptime.
• Lead in root cause analysis and continuous improvement for critical systems.

Skills

Facilities management

Incident response

Data center operations

Leadership

UPS/PDUs/AC units

Tools

CMMS

MCIM Asset Management

Corrigo

Job description

JLL empowers you to shape a brighter way.

Our people at JLL are shaping the future of real estate for a better world by combining world class services, advisory and technology for our clients. We are committed to hiring the best, most talented peopleand empowering them tothrive, grow meaningful careers and to find a place where they belong. Whether you've got deep experience in commercial real estate, skilled trades or technology, or you're looking to apply your relevant experience to a new industry, join our team as we help shape a brighter way forward.

Job Title: US Critical Environments Operations Supervisor

JLL Job Profile

Reporting To (title): US Critical Environments Operations Manager

Date: July, 2026

Exemption: X Exempt _ Non-Exempt

CM Level: (Comp Team Use Only) P3

Job Code: TBD

Job Summary

The US Critical Environments Operations Supervisor provides direct operational support to the US Critical Environments Operations Manager and assists in managing mission-critical engineering services across a designated client's critical environments. This role serves as a critical link between critical environments field operations and critical environments management, ensuring 24/7/365 reliability of critical infrastructure systems including UPS, generators, HVAC, power distribution, and building automation systems. The Operations Supervisor coordinates daily activities across data centers, trading floors, LAN rooms, disaster recovery space, and other critical environments while supporting vendor management and developing the technical and leadership capabilities necessary to advance into the Operations Manager role. This position requires hands-on engagement with critical environments operations teams while building strategic oversight skills to ensure 100% uptime, infrastructure reliability, cost efficiency, and superior client satisfaction in high-availability environments.

Job Responsibilities

Area of Responsibility

Key Elements and Essential Tasks

Time Spent on Task

1. Critical Operations Support

• Assist CE Operations Manager in managing critical engineering operations across assigned facilities
• Coordinate with JLL CE Management Leads, client Critical Environments Team, and engineering/operations teams to maintain 100% infrastructure availability
• Monitor and respond immediately to critical facility alarms, incidents, and infrastructure issues
• Support implementation and daily execution of 100% uptime Critical Environment Management program reflecting all client requirements and industry best practices
• Ensure readiness and successful execution of JLL Client Assurance Program (JCAP) Audits for critical environments
• Track and report on critical KPIs including uptime percentage, mean time between failures (MTBF), mean time to repair (MTTR), and critical load reliability
• Maintain awareness of critical load requirements and N+1 or 2N redundancy configurations

Less than 20%

20% - 40%

40% - 60%

60% or greater

2. Critical Systems Maintenance Coordination

• Oversee daily execution of preventive and predictive maintenance on critical systems (UPS, generators, PDUs, CRAC/CRAH units, electrical distribution, fire suppression)
• Ensure strict adherence to CMMS, MCIM Asset management system, Corrigo, and critical environment work order protocols
• Proactively identify and eliminate single points of failure and risks to critical infrastructure
• Provide technical guidance to Chief Engineers and critical environments staff on complex systems troubleshooting
• Support 5+ year capital budget forecasting for critical infrastructure replacement and upgrades
• Assist with Coordinating with Strategic Sourcing on critical vendor contracts, OEM service agreements, and emergency response contracts
• Lead participation in root cause analysis for any critical incidents, near-misses, or infrastructure anomalies
• Ensure all critical maintenance activities follow change management protocols and minimize risk to live environments
• Assist to Identify and implement energy efficiency opportunities within critical cooling and power systems without compromising reliability

Less than 20%

20% - 40%

40% - 60%

60% or greater

3. Team Leadership & Development

• Supervise and provide day-to-day direction to Chief Engineers, Asst Chiefs and Critical Environments Engineers operating in mission-critical environments
• Build effective working relationships with on-site critical operations teams, remote monitoring centers, and emergency response personnel
• Schedule and prioritize critical maintenance windows, vendor activities, and emergency response with zero unplanned downtime
• Foster culture of precision, accountability, and calm under pressure required for critical environment operations
• Assist CE Operations Manager with performance management of critical environments engineering staff
• Respond to and coordinate resolution of after-hours critical incidents and emergencies

Less than 20%

20% - 40%

40% - 60%

60% or greater

4. Environmental Health and Safety in Critical Environments

• Support EHS professional and CE Operations Manager in maintaining comprehensive safety program specific to critical environments
• Ensure all personnel are trained and qualified for energized electrical work, arc flash protocols, and hot work in critical spaces
• Enforce strict adherence to Safe Work practices for energized work up to 480V, working at heights on equipment platforms, and confined space entry in electrical/mechanical rooms
• Monitor vendor pre-qualification for critical systems work and verify proper safety certifications
• Conduct safety risk assessments before all maintenance activities in live critical environments
• Maintain lockout/tagout (LOTO) program compliance and equipment isolation procedures
• Promote safety-first culture while maintaining operational urgency in critical situations

Less than 20%

20% - 40%