Senior Mechanical Commissioning Engineer (REMOTE)

JLL is a leading global provider of real estate and investment management services, seeking an experienced Mechanical and Controls Commissioning Engineer to lead commissioning for data center projects. The role involves developing commissioning proposals, managing commissioning activities, and ensuring integration of mechanical and control systems in mission-critical environments.

Responsibilities:

• Developing detailed commissioning proposals and scope documents based on client RFPs, design drawings, and specifications while leading pre-commissioning planning sessions with stakeholders
• Managing and performing holistic factory and onsite commissioning activities (Level 0 – Level 6) for mechanical and control systems infrastructure
• Executing comprehensive commissioning of mission-critical systems including CRAH units, chilled water plants, central cooling plants, dry coolers, liquid cooling systems, advanced server rack containment strategies, and associated controls and monitoring systems
• Developing system-specific functional performance tests and integrated systems testing protocols that meet industry standards (ASHRAE Guideline 0 or similar)
• Creating commissioning plans, test procedures, and comprehensive final reports while documenting deficiencies using structured tracking systems and overseeing resolution through substantial completion
• Directing cross-functional commissioning teams of 2-8+ engineers and technicians while coordinating with project stakeholders throughout the project lifecycle from design phase through transition to operations
• Conducting commissioning training for Owner's operations staff and providing knowledge transfer documentation on larger projects
• Managing commissioning schedules, ensuring optimal team utilization, identifying potential failure modes, and developing mitigation strategies
• Interpreting project drawings and specifications, identifying design issues, and communicating technical concerns effectively to clients and project teams

Requirements:

• Minimum 7 years of documented experience leading hands-on data center commissioning activities with at least 5 years specifically in data center cooling systems and building monitoring and automation commissioning
• Proven track record leading mechanical and controls commissioning of facilities with power densities exceeding 25kW per rack
• Deep understanding of cooling plant sequences of operations, redundancy concepts, and their implementation in mission critical designs
• Experience working in partnership with major cooling equipment manufacturers (JCI, Daikin, Trane, Vertiv, Schneider, etc.)
• Proficiency in commissioning management software platforms (CxAlloy, ACC, Procore, Bluebeam, and similar)
• Advanced knowledge of commissioning processes for data center cooling infrastructure and building monitoring and controls platforms
• Expertise in precision HVAC systems, glycol cooling, and thermal management strategies including liquid cooling applications
• Strong understanding of BAS/DCIM integration, monitoring protocols, and alarm management protocols
• Ability to travel 50% annually throughout North America and work in active construction environments, climb ladders, and work in mechanical/electrical rooms with availability for occasional emergency commissioning support and weekend/evening critical testing activities
• Bachelor's degree in related technical field
• Professional Engineer (PE) license and PMP certifications
• Industry recognized commissioning certification (currently or pursuing)
• Experience working on hyperscale data center projects (AWS, Microsoft, Google, Meta, etc.)