Assistant Chief Engineer

Data Center Assistant Chief Engineer

A Data Center Assistant Chief Engineer supports the Chief Engineer in managing critical infrastructure and mechanical/electrical systems that ensure continuous uptime and optimal performance of data center operations. This mission‑critical role demands extensive technical expertise in high‑availability environments where system failures can result in significant business impact.

• Critical Systems Management oversees the operation and maintenance of mission‑critical data center infrastructure including redundant HVAC systems, uninterruptible power supplies (UPS), emergency generators, electrical distribution systems, fire suppression systems, and building management systems (BMS). Ensures all systems maintain 99.99%+ uptime through rigorous preventive maintenance and proactive monitoring.
• 24/7 Operations Support manages round‑the‑clock operations to maintain continuous service availability. Coordinates shift schedules, responds to critical alarms and emergencies, implements hot‑swap procedures for equipment replacement without downtime, and maintains detailed incident logs and reporting systems.
• Preventive and Predictive Maintenance develops and executes comprehensive maintenance programs for all critical infrastructure. Includes thermal imaging inspections, power quality analysis, load testing of backup systems, filter changes, oil analysis, battery monitoring, and documentation of all maintenance activities in CMMS platforms.
• Capacity Planning and Energy Management monitors power and cooling capacity, tracks utilization trends, and provides input on infrastructure expansion planning. Implements energy optimization strategies, monitors Power Usage Effectiveness (PUE) metrics, and identifies opportunities to improve efficiency while maintaining redundancy requirements.
• Team Leadership and Training supervises and mentors facilities technicians and engineers, develops technical competencies, ensures proper safety procedures, coordinates cross‑training programs, and acts as Chief Engineer when needed. Provides strong leadership in high‑pressure situations.
• Vendor and Change Management manages relationships with equipment manufacturers, service contractors, and utility providers. Oversee planned maintenance windows, coordinate system upgrades with minimal impact, review and approve change requests, and ensure all work meets Tier III/IV data center standards.

• Education and Experience 7‑10 years of experience in critical facilities or data center environments with at least 2‑3 years in a supervisory capacity. A bachelor’s degree in electrical or mechanical engineering, facilities management, or related technical field is preferred, though equivalent experience may be considered.
• Technical Expertise
  • High‑voltage electrical systems (480V/277V, 13.2kV distribution)
  • UPS systems (500kW+ capacity), battery banks, and power distribution units
  • N+1, 2N, and 2N+1 redundancy configurations
  • Precision cooling systems (CRAC/IDAPR DX Systems)
  • Diesel generators and automatic transfer switches (ATS)
  • Fire suppression systems (FM‑200, Inergen, pre‑action sprinkler)
  • Environmental monitoring and BMS platforms
• Certifications and Licenses Stationary engineer license (appropriate class for facility size), electrical license, and data center‑specific credentials such as Certified Data Centre Professional (CDCP), Data Center Certified Associate (DCCA), or equivalent. OSHA safety certifications and arc flash training are typically mandatory.
• Critical Competencies Exceptional troubleshooting abilities under pressure, strong understanding of ITIL change management processes, proficiency with CMMS and DCIM software, excellent documentation skills, and clear communication with both technical teams and business stakeholders. Flexibility for on‑call rotations and emergency response is essential.

Data center environments require working in temperature‑controlled spaces with significant background noise from cooling equipment. Physical requirements include the ability to lift 50+ pounds, work on ladders, and navigate tight spaces. The role demands strict adherence to safety protocols, including proper PPE usage and lock‑out/tag‑out procedures for high‑voltage work.

This position does not provide visa sponsorship. Candidates must be authorized to work in the United States without sponsorship.

Estimated Compensation

-  USD per year

Location On‑site - Totowa, NJ

Jones Lang LaSalle ("JLL") is an Equal Opportunity Employer and is committed to working with and providing reasonable accommodations to individuals with disabilities. If you need a reasonable accommodation because of a disability for any part of the employment process, please email  For additional details, please refer to the company career site.