Sr. Commissioning Mechanical Engineer

Job Title: Sr. Commissioning Mechanical EngineerLocation: Riyadh / KSAEmployment Type: Full-Time | On-SiteAbout CSI Global:At CSI Global, we specialize in delivering advanced electromechanical, testing, and commissioning services across the GCC and Globally. We power infrastructure through technical excellence and engineering innovation. Join a team committed to shaping the future of transmission and energy systems in the region.Position Overview:We are seeking an experienced Sr. Commissioning Mechanical Engineer who will lead end-to-end commissioning of mechanical building systems, HVAC, chilled water, plumbing, and fire protection, so the asset reaches safe, code-compliant, verifiably performing handover (FAC) on time and with complete documentation.Key Responsibilities:Plan and run the Cx program (lots, sequences, windows) aligned to the construction master schedule; maintain a live Commissioning Activity Tracker (CAT), punch lists, and risk register.Prepare/review ITPs, pre-functional checklists (PFCs), method statements, and test packs; execute FPT / SAT / IST and close Consultant comments to final acceptance.Commission Core Systems:HVAC & CW/CHW: AHUs/FAHUs/FCUs, pumps, valves, coils, heat exchangers, VAVs, dampers; hydronic flushing/cleaning, water quality, flow balancing, TAB and thermal performance verification.Ventilation/Smoke Control: pressurization fans, stairwell/lobby pressurization, car park ventilation, CO systems.Plumbing & Drainage: pressure tests, chlorination/disinfection, functional tests (H/W mixing, PRVs, transfer pumps).Fire Protection: hydrostatic tests, pump performance curves, jockey sequencing, alarm/interlock checks, FA / BMS integration.Validate controls and BMS interfaces (points mapping, sequences of operation, alarms/safeties) and participate in Integrated Systems Testing with FA/ELV.Coordinate daily with GC/Subs/Vendors/Consultant on prerequisites, access/permit-to-work, and energization/commissioning windows.Produce O&M manuals, training materials, spares lists, warranties; deliver client training and signoffs.Drive regular progress/technical/Cx meetings; surface risks early and execute recovery plans.Required Qualifications:5–8 years of mechanical testing & commissioning on mid-to-large projects (healthcare, airports, data centers, high-rise, industrial).BSc in Mechanical Engineering (or equivalent).Hands-on with TAB, hydronic balancing, ventilation balancing, pressure/leak tests, chlorination, smoke control performance tests, pump curves, equipment functional tests, and IST participation.Strong documentation discipline (ITPs, PFCs, test packs, SAT/IST reports, certificates; red-lines/as-builts).Working knowledge of codes/standards (ASHRAE, SMACNA/DW144, NFPA, IPC, CIBSE, ISO) and safety/permit processes.Preferred Qualifications:Complex facilities commissioning (Tier-III/IV DCs, hospitals, labs) and authority/third-party approvals (e.g., Civil Defense / House of Expertise in KSA).Controls/BMS exposure (Siemens/JCI/Honeywell/etc.), data loggers, trend analysis, and Power BI/advanced Excel for trackers.Experience with acoustic/vibration tests and thermal imaging for envelope/HVAC diagnostics.#J-18808-Ljbffr