Sr. Commissioning Mechanical Engineer

Job Title: Sr. Commissioning Mechanical Engineer

Location: Riyadh / KSA

Employment Type: Full-Time | On-Site

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.

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.

• 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 sign-offs.
• Drive regular progress/technical/Cx meetings; surface risks early and execute recovery plans.

• 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.

• 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.