WSP in the Middle East is currently hiring a Specialist – Mechanical – Metro stations to join our team in Riyadh, Saudi Arabia. The successful candidate will own the end-to-end mechanical station fit-out design for rail/metro/train stations—covering HVAC, environmental control, smoke control/TVS, stairwell/room pressurization, cooling of technical spaces, and integration with BMS/SCADA—through concept, schematic, detailed/IFC, tender, and construction support. + **Lead station HVAC & ventilation design (underground, at-grade, elevated):** cooling/heating load estimates, plant sizing (chilled water/DX/VRF), AHU/FAHU/FCU selection, filtration strategy (sand/dust), ventilation/pressurization of platforms, concourses, back-of-house and plantrooms. + **Engineer smoke control & TVS:** fan, shaft and damper sizing/arrangement; platform & concourse smoke layer management; stair & lift lobby pressurization; PSD heat load coordination; emergency modes and control logic. + **Technical room cooling & resilience:** N+1 redundancy and environmental control for S&T/relay/SCADA/UPS rooms, communications and data spaces; thermal runaway risk checks and alarm set-points. + **High-ambient design:** equipment derating, coil selections, corrosion mitigation, airside economizer feasibility, sand-ingress protection, acoustic and indoor air-quality criteria. + **Digital delivery:** Revit/AutoCAD & Navisworks BIM coordination, clash prevention, interface matrices; structured model reviews and info-exchange (BEP compliance). + **Calculations & deliverables:** Basis-of-Design, detailed calcs, P&IDs/schematics, control sequences, layouts/sections/details, equipment schedules, specifications/BOQs, performance ERs. + **Analysis & verification** : CFD/FDS for smoke and comfort, SES or equivalent for tunnel/station ventilation where applicable; egress and fire strategy interface workshops. + **Approvals & stakeholders:** manage KSA authority submissions; lead multidisciplinary design reviews; run value engineering and risk registers. + **Construction support:** respond to RFIs, review vendor submittals, witness FAT/SAT, support T&C and seasonal commissioning. + **Team leadership:** mentor engineers/designers; plan workloads, QA/QC deliverables, and contribute to proposals/level-of-effort. + Bachelor’s or Master’s degree in Electrical Engineering. + Professional registration (e.g., CEng/PE) strongly preferred. + 12–18+ years in building services with major rail/metro station HVAC/ventilation delivery in design consultancy; GCC experience strongly preferred. + Proven expertise in: + Station HVAC, ventilation and smoke control/pressurization to NFPA/EN standards. + Cooling of critical technical rooms with resilience (N+1, duty/standby). + Writing control philosophies/sequences and BMS/SCADA integration. + BIM coordination (Revit/Navisworks) and production of IFC-ready deliverables. + Tools: HAP/IES/TRACE (or equivalent), CFD/FDS, SES (or similar), MS Office. + Strong stakeholder skills and the ability to lead workshops with client, operator, and authorities. **Nice to Have** + District cooling interface design; energy modelling/optimization for high-ambient climates. + Experience with tunnel ventilation interactions and evacuation scenarios in multi-station corridors. + Prior approvals experience with Riyadh Civil Defense/SBC. + RAMS familiarity (EN 50126/8/9) and reliability-led design. Imagine a better future for you and a better future for us all. Join our close-knit community of talented individuals who share your passion for making a positive impact. Our global team includes more than 69,000 employees, working together to make a difference in communities both close to home and around the world. With us, you can. Apply today.