Mechanical Commissioning Lead

Lotus Works is an Engineering Services provider specializing in managing Commissioning, Construction Services, Calibration, Operations & Maintenance scopes of work within global manufacturing facilities. Lotus Works operates globally across EMEA and North America partnering with the world's leading manufacturers across the Semiconductor, Pharmaceutical & Biologics, Medical Device and Data Center sectors. Our team of Engineering and Technical professionals is immersed in cutting-edge technologies and innovations.

Lotus Works is committed to a diverse and inclusive workplace, integral to our people-first approach.

Lotus Works is seeking an experienced Mechanical Commissioning professional to support the commissioning of critical mechanical systems within a large-scale data center environment. This role will lead mechanical commissioning activities from design review and startup through functional testing, Integrated Systems Testing (IST), and final turnover. The position will focus on chilled water, condenser water, heat rejection, air handling, room cooling, ventilation, pressurization, BMS controls, fuel oil, and plumbing/process water systems.

The successful candidate will coordinate with contractors, controls integrators, TAB firms, OEM representatives, and commissioning teams to ensure systems are tested, issues are resolved, and the facility is ready for operations.

• Review 30/60/90% mechanical drawings and specs: flow diagrams, equipment schedules, sequences of operation (SOO), points lists, piping/duct layouts, control diagrams
• Check the design against the OPR/BOD: cooling redundancy (N+1, 2N), thermal ride-through, concurrent maintainability, design-day capacity, setpoints, and failure behavior
• Review the SOO line by line for gaps, conflicts with the electrical topology, and untestable statements — the SOO is the mechanical equivalent of the coordination study and it's the most common source of L4 failures
• Flag commission ability gaps: missing test ports, no isolation to test redundancy, insufficient metering (flow, BTU, kW) to verify capacity, no provision for load simulation
• Write the mechanical Cx Plan section and Division 23/25 Cx spec language: levels, witness requirements, TAB scope, trend-log requirements, documentation deliverables
• Define the TAB/Cx boundary and the controls integrator's point-to-point responsibilities in writing
• Identify FWT candidates (chillers, CRAHs/CRACs, AHUs, pumps/VFDs, cooling towers/dry coolers) and write FWT requirements
• Build the mechanical Cx schedule: flushing and fill milestones, water treatment, TAB, load simulation method (electric heaters, load banks, or server simulators), seasonal constraints

• Attend or delegate FWT for chillers (performance test per AHRI 550/590 at project conditions), CRAH/CRAC units, AHUs, cooling towers, pumps and VFD packages
• Verify the factory test runs at the project's design conditions and part-load points, not just the OEM rating point
• Witness controls simulation on packaged units: staging, failure response, alarm mapping, BMS protocol integration
• Document nonconformances and hold ship release until resolved or owner-accepted
• Collect FWT reports, performance curves, and controller firmware/settings as the site baseline

• Review or witness MC checklists: equipment set, aligned, vibration isolation, piping supports, valve tags, insulation, labels, access clearances
• Verify piping and duct installation match the drawings: pipe sizing, valve orientation, strainers, flow direction, expansion, air vents and drains
• Witness or review pressure testing, flushing, cleaning, fill, and initial water…