Mechanical & HVAC Engineer - Construction Supervision Consultant

**Position Objective:** The Mechanical Engineer supervises the Contractor's mechanical works, including heating, ventilation and air conditioning, plumbing, drainage and firefighting, across off-site manufacturing and on-site installation. The role reviews and approves the detailed design, drawings and submittals, witnesses commissioning, and accepts the works against the project requirements, specifications and Saudi codes, for the PMC's final approval. **Job Description & Responsibilities:** Key responsibilities of the Mechanical & HVAC Engineer on the modular building construction supervision team: * Review and approve the mechanical detailed design and Issued-For-Construction (IFC) drawings from the Designer or the design-build Contractor, together with the Contractor's shop drawings and as-built drawings. * Review and approve the Contractor's method statements (MS), material approval requests (MAR), inspection and test plans (ITP) and prequalification documents (PQD) for mechanical subcontractors, before work or procurement starts. * Supervise installation of HVAC, plumbing, drainage and firefighting systems in the factory-built modules, and the on-site mechanical works during module erection and external infrastructure, covering connection of services, ductwork, piping and pumping. * Respond to the Contractor's material inspection requests (MIR) and work inspection requests (WIR) at the agreed hold and witness points, accepting compliant work or returning deliveries and works for rectification. * Witness the Factory Acceptance Test (FAT) of mechanical equipment such as pumps and chillers before items are released to site, and the Site Acceptance Test (SAT) after installation. * Witness mechanical testing, air and water balancing, and pre-commissioning and commissioning of HVAC, firefighting and plumbing systems, checking results against the design intent. * Confirm water-based fire protection meets the applicable codes such as NFPA 13, 14 and 20, and verify smoke-control and stairwell pressurisation systems. * Witness the fire-alarm and ELV integrated cause-and-effect interface test, and confirm life-safety functions perform as designed under Civil Defense requirements. * Review the commissioning document set, including the commissioning plan, testing and commissioning procedures and operation and maintenance (O&M) manuals, and oversee mechanical completion and punch-list close-out. * Raise Site Observation Reports (SORs) and Non-Conformance Reports (NCRs) when mechanical work fails specification, coordinate interfaces with the electrical, low-current and civil disciplines, and track each item to verified close-out. * Review the Contractor's mechanical quantities and payment applications as the first check before the PMC, maintain inspection records and as-built verification, and provide daily, weekly and monthly input to the Project Manager and the reporting cycle. **Qualifications & Experience:** * An accredited bachelor's degree in mechanical engineering, with registration or eligibility with the Saudi Council of Engineers (SCE); Professional Engineer (PE) accreditation is preferred. * Minimum 8 years in mechanical construction supervision, covering HVAC, plumbing, drainage and firefighting systems on building or infrastructure projects. * Working knowledge of HVAC, firefighting and plumbing design and installation, with awareness of ASHRAE guidance and the applicable NFPA and Saudi codes; able to review and verify HVAC load calculations, drawings and models. * Practical command of the submittal and inspection workflow: method statements, material and work inspection requests, inspection and test plans, and prequalification documents. * Experience on modular, prefabricated or precast construction or Design for Manufacture and Assembly (DfMA) programs is an advantage. * Fluent with mainstream project and supervision systems (for example Primavera P6, Aconex and AutoCAD), and quick to adopt the Consultant's in-house systems. * Saudi or Gulf (GCC) construction-supervision experience and familiarity with the Saudi Building Code (SBC) and Civil Defense fire requirements are highly preferred. * Good written and spoken English for inspection records and reporting; Arabic is an advantage. * Open to international and Saudi candidates, who must be legally eligible to work in Saudi Arabia. The role is based across multiple cities in the Kingdom, and some travel may be required.