Commissioning Senior Manager - Mechanical

Fleet Data Centers; United States; On-site; USD 150,000 - 230,000; Full time

Job summary

Fleet Data Centers seeks a Senior Mechanical Commissioning Manager to oversee end-to-end commissioning for all mechanical systems in mission-critical facilities. You will ensure installation, testing, and handover meet performance, reliability, and safety targets while coordinating with design, controls, and operations teams.

The role requires leading multi-disciplinary teams under tight deadlines, maintaining accurate commissioning records, and delivering auditable evidence for on-time

Qualifications

• Strong understanding of HVAC systems and commissioning principles.
• Experience leading multi-disciplinary teams under tight deadlines.

Responsibilities

• Review Basis of Design, drawings, and submittals for commissioning requirements and testability.
• Review SOOs with design/controls teams; ensure sensor placement and valving support commissioning.
• Develop and upkeep Commissioning Plan (scope, phasing, staffing, documentation control).
• Define mechanical commissioning schedule aligned with milestones; identify long-lead equipment.
• Create Level 1–5 commissioning checklists and Level 4–5 test scripts.
• Lead commissioning meetings; coordinate Site Acceptance, Installation, and Pre-energization inspections.
• Oversee first-time energization, PFCs, SATs, and FTs for mechanical systems across modes.
• Coordinate Level-3 start-ups with vendors; verify conformance to submittals and SOOs.
• Oversee TAB strategy, witnessing, and final report acceptance.
• Validate BMS point-to-point, alarms, trends, graphics, and narratives.
• Drive IST readiness with electrical and life-safety teams; ensure design intent.

Job description

Fleet Data Centers designs, builds and operates mega-scale data center campuses. Fleet provides its customers flexibility and predictability to meet their upside demand forecasts, addressing a key need in the market as traditional leased models are struggling to keep pace with the demand for new Cloud and AI infrastructure. Fleet is led by a team of industry veterans that have already made a lasting imprint on the evolution of global digital infrastructure and are committed and uniquely capable of upleveling data center development scale and operations in the face of rising demand. Fleet is well positioned to bring in-house design, engineering and operational capabilities to collaborate with customers on tailored solutions for campuses of 500MW+. This unique model enables Fleet to provide the world's largest and most sophisticated customers a seamless extension of their own data center fleets with constant access to design innovation.

The Mechanical Commissioning Senior Manager leads the end-to-end commissioning lifecycle for all mechanical systems in mission-critical and supporting facilities , ensuring these are installed, tested, verified, and handed over to operations to meet performance, reliability, and safety requirements. This role integrates design intent with field execution , orchestrates multi-disciplinary teams, manages risk, and delivers auditable commissioning evidence that enables on-time, on-budget, and right-first-time facility readiness.

The successful candidate will need to possess a strong understanding of HVAC systems, chilled water plants, industrial water systems, adiabatic cooling, CRAC/CRAH units, hydronic distribution, fuel oil systems, building management systems (BMS), fire protection systems, water treatment plants, and administration and logistics buildings . In addition, they will need to lead multi-disciplinary teams under tight deadlines and high-pressure conditions, while maintaining accurate commissioning records and turnover packages shared with Fleet leadership. This person will attend all commissioning meetings, track schedule adherence, issue closure rates, and system performance metrics.

Job Responsibilities

The successful candidate will have experience and practical expertise in the following:

• Planning & coordination:
  • Review Basis of Design (BoD), drawings, specifications, and submittals for commissioning requirements and testability.
  • Review and collaborate on sequences of operation (SOO) with design and controls teams; ensure sensor placement, access, and valving support for commissioning and future operations.
  • Development and/or assist with the development and upkeep of the Commissioning Plan (scope, phasing, staffing, RASIC, tools, documentation control, quality gates).
  • Define mechanical commissioning schedule aligned with construction and IST milestones; identify long-lead equipment and factory witness tests.
  • Develop and/or assist with the development of Level 1, Level 2, and Level 3 commissioning checklists.
  • Develop and/or assist in the development of Level 4 and Level 5 commissioning test scripts.
• Commissioning Operations & Execution:
  • Be responsible for commissioning team communications and updates, including leading or co-leading meetings.
  • Oversee and/or lead Site Acceptance, Installation, and Pre-energization inspections, checklists, required documentation provided by contractors and vendors and issue resolution.
  • Oversee and/or lead first time energization, pre-functional checklists (PFCs), start-up acceptance testing (SAT), and functional test scripts (FTs) for mechanical equipment and systems across all modes (normal, degraded, failover, emergency, maintenance bypass, recovery), including required documentation provided by contractors and vendors and issue resolution.
  • Oversee vendor/OEM Level - 3 start-ups; verify conformance to submittals and sequences of operation (SOO).
  • Oversee and coordinate TAB (Testing, Adjusting, Balancing) strategy, prerequisites, witnessing, and final report acceptance.
  • Validate BMS point-to-point, alarm priorities, trending, graphics, and historian; ensure controls narratives are executable and traceable.
  • Oversee and/or lead the plan and execution load bank testing, thermal validation protocols (as applicable), and performance testing to prove capacity and stability.
  • Drive Integrated Systems Testing (IST) readiness and execution with electrical and life safety teams, ensuring mechanical responses and interlocks perform per design intent.
  • Ensure project commissioning schedules are being met.

Regularly required to stand, walk, use hands and fingers, handle or feel objects, tools, or controls; reach with hands and arms; stoop, kneel, crouch, or crawl; talk, hear, and smell. Frequently required to sit, climb, and balance. Specific vision abilities required by this job include close vision, distance vision, basic color differentiation and the ability to adjust focus. Regularly lift and/or move up to 25 pounds