# Associate Director – Building Services (Mechanical)

**Company**: WSP
**Location**: Riyadh
**Work arrangement**: onsite
**Experience**: senior
**Job type**: full-time
**Category**: Engineering
**Industry**: Consulting

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## Description

WSP in the Middle East is currently hiring an Associate Director – Building Services (Mechanical) 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.

## Responsibilities

- 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.

## Qualifications

- 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.

## Skills

### Required
- HVAC design
- ventilation design
- smoke control design
- BMS/SCADA integration
- Revit
- AutoCAD
- Navisworks
- HAP/IES/TRACE
- CFD/FDS
- SES

### Nice to have
- District cooling interface design
- energy modelling
- tunnel ventilation interactions
- RAMS familiarity

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