Sr. Mechanical Building Engineer - Critical Environment

JLL

Spartanburg, SC

Full Time

Posted August 17, 2026

$123k - $175k· Est.

Power Generation

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Listing evidence and provenance

Source: Workday View original listing
Freshness: Open in the current public read path; this is not an employer guarantee.Last observed October 5, 2026
Classification: Modern power-system classification not yet published for this listing.Legacy source industry field: Power Generation
Pay provenance: Estimated benchmark; not employer-provided

Job Description

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.

Key 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

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

Benefits & Perks

JLL recognizes the impact that the workplace can have on your wellness, so we offer a supportive culture and comprehensive benefits package that prioritizes mental, physical and emotional health. Some of these benefits may include:
401(k) plan with matching company contributions
Comprehensive Medical, Dental & Vision Care
Paid parental leave at 100% of salary
Paid Time Off and Company Holidays
Early access to earned wages through Daily Pay
At JLL, we harness the power of artificial intelligence (AI) to efficiently accelerate meaningful connections between candidates and opportunities. Using AI capabilities, we analyze your application for relevant skills, experiences, and qualifications to generate valuable insights about how your unique profile aligns with the specific requirements of the role you're pursuing.