Critical Environment Assistant Chief Engineer

JLL empowers you to shape a brighter way
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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.

As an Assistant Chief Engineer, Data Centers at JLL, you will play a critical role in supporting the safe, reliable, and efficient operation of mission-critical data center facilities. Working closely with the Chief Engineer, you will help oversee daily engineering operations, support technical teams, and ensure critical infrastructure systems perform at the highest standards of uptime and operational excellence. This role requires strong technical expertise across electrical and mechanical systems, the ability to respond effectively during critical incidents, and a proactive approach to preventative maintenance and continuous improvement.

At JLL, we are collectively shaping a brighter way – for our clients, ourselves and our fellow employees – by delivering resilient, innovative solutions within complex critical environments. We believe the most effective teams are built when everyone is empowered to thrive, and this role offers opportunities to strengthen your technical expertise while contributing to a collaborative and high-performing engineering culture.

• Assist in managing day-to-day data center facility operations and maintenance activities to support maximum uptime, operational reliability, and client satisfaction.
• Support the Chief Engineer in supervising and mentoring engineering teams, technicians, and vendors while promoting a strong culture of safety, accountability, and teamwork.
• Monitor and analyze the performance of critical infrastructure systems including electrical distribution, UPS systems, generators, cooling systems, and building automation platforms.
• Coordinate and support preventative maintenance activities, inspections, and corrective repairs to ensure compliance with operational standards and maintenance schedules.
• Serve as a first point of contact for service-impacting electrical distribution events and assist with troubleshooting, escalation management, and incident mitigation efforts.
• Participate in critical incident response activities, including after-hours support, root cause analysis investigations, and implementation of corrective actions to prevent recurrence.
• Collaborate with cross-functional teams to support safety initiatives, compliance requirements, infrastructure upgrades, and operational improvement projects.
• Assist with technical reporting, documentation management, operational procedures, and client communications related to facility performance and engineering activities.
• Support capacity planning and infrastructure enhancement projects while embracing more innovative ways of working to improve operational efficiency and long-term reliability.

• Minimum of 5 years of experience in data center operations, mission-critical facilities management, or related engineering environments.
• Strong technical knowledge of data center infrastructure systems including power distribution, cooling systems, UPS equipment, generators, and building automation systems.
• Familiarity with industry standards and best practices including ASHRAE, TIA, and Uptime Institute guidelines.
• Demonstrated ability to troubleshoot complex operational issues…