Critical Environment: Sr. Mechanical Building Engineer

JLL•Spartanburg, SC

2d•Onsite

About The Position

JLL empowers you to shape a brighter way. Our people at JLL and JLL Technologies 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 people and empowering them to thrive, 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 a Senior Mechanical Building Engineer at JLL, you will serve as the technical cornerstone for advanced mechanical systems that sustain today's most critical data center and facility environments. This senior-level role combines deep mechanical engineering expertise with hands-on operational leadership, positioning you as the go-to expert for complex HVAC systems, chillers, cooling infrastructure, and environmental control systems. At JLL, we are collectively shaping a brighter way — for our clients, ourselves and our fellow employees, and your technical mastery will be essential in ensuring mission-critical uptime and operational excellence. You'll lead sophisticated troubleshooting initiatives, mentor junior engineering staff, and drive innovative solutions that optimize both performance and energy efficiency. We embrace more innovative ways of working and prioritize opportunities to strengthen and advance your career, providing you with the platform to apply cutting-edge mechanical engineering principles while managing large-scale infrastructure projects. This role offers the perfect blend of technical challenge and leadership responsibility, allowing you to shape the future of critical facility operations while advancing your professional expertise.

Requirements

Minimum 5 years of hands-on technical experience in critical facility mechanical engineering with expertise in HVAC, plumbing, and production equipment
At least 3 years of specialized experience in data center or raised floor environments with complex cooling requirements
Advanced technical knowledge of CRAC/CRAH systems (Liebert preferred), chillers, and comprehensive cooling infrastructure operations
Current Universal EPA 608 Certification demonstrating expertise in refrigeration and environmental compliance
Strong analytical and problem-solving capabilities for diagnosing and resolving complex mechanical system challenges
Demonstrated leadership and mentoring experience with ability to guide technical teams and drive operational excellence
Excellent verbal and written communication skills for creating technical documentation, training programs, and stakeholder reporting
Physical capability to lift up to 80 pounds, work at heights up to 30 feet, and operate in extreme temperature conditions and confined spaces
Availability for emergency response calls, holiday coverage, and varied schedules as critical operations demand

Nice To Haves

Bachelor's degree in Mechanical Engineering or equivalent technical education with focus on HVAC and building systems
Specialized expertise in Central Utility Plant Operations and advanced building automation systems integration
Professional mechanical engineering license or industry-recognized advanced technical certifications
Comprehensive experience with computerized maintenance management systems for large-scale facility operations
Knowledge of fire and life safety systems integration with mechanical equipment and emergency protocols
Proven experience with energy management systems and successful implementation of sustainability initiatives that reduce environmental impact

Responsibilities

Lead comprehensive operations and maintenance of critical mechanical infrastructure including HVAC systems, chillers, CRAC/CRAH units, cooling towers, and air handling systems
Oversee complex chilled water systems, pumps, valves, piping networks, and filtration systems to maintain optimal environmental conditions for mission-critical operations
Execute advanced diagnostics and root cause analysis on sophisticated mechanical equipment failures, implementing sustainable solutions
Apply mechanical engineering principles to design and implement cooling solutions optimized for high-density server environments and evolving technology demands
Serve as the primary escalation point for Level 1 and Level 2 mechanical issues requiring advanced technical expertise and critical problem-solving
Develop and execute comprehensive preventive maintenance schedules that ensure 100% uptime and peak performance across all mechanical infrastructure
Analyze mechanical system performance data and implement optimization strategies that reduce Power Usage Effectiveness and enhance sustainability
Mentor and guide junior mechanical technicians and engineers, fostering technical excellence and professional development within the team
Coordinate complex mechanical infrastructure projects including system upgrades, expansions, and integration of cutting-edge technologies