Senior Technical Mechanical Engineer - Plumbing & Fire Fighting - 100% (M/F)

ARX is a global network of specialists in engineering, design, and architecture. Our team offers 360-degree consulting, project management, and technical services in:

airports, bridges, buildings, cableways,

digital innovation, environment, equipment,

geology, geotechnics, hydropower, metros,

nuclear plants, oil & gas, pipelines, ports,

railways, river engineering, roads, traffic,

tunnels, and water/wastewater treatment.

With offices across Europe, North and South America, Asia, Africa, and Oceania, our agile task force combines global expertise with local know-how. The result is our uniquely "glocal" approach, which allows us to meet the specific needs of each community while incorporating international best practices. At ARX, smart minds strive for a sustainable future, transforming communities one innovative project at a time.

People are the heart and soul of ARX. We are a home for innovators, visionaries, and experts to develop talents, launch careers, and collaborate with fellow specialists. ARX values individuals. Believing their brilliance and determination will provide solutions to tomorrow's challenges, we welcome professionals who will both benefit from and enrich our team.

ARX marks a significant expansion into the Middle East with its offices in UAE and KSA. This underscores our dedication to innovation and engineering excellence, bolstering our position in the dynamic GCC market.

For our project in Madinah, Kingdom of Saudi Arabia, we are looking for

Senior Technical Mechanical Engineer (Plumbing & Fire Fighting)- 100% (m/f)

The Ideal Candidate will have senior technical-office and design review experience across plumbing, drainage, domestic water, rainwater, gas, fire-fighting, and active fire life safety systems for high-rise, hospitality, mixed-use, or large-scale commercial developments in Saudi Arabia. The role requires strong hydraulic calculation capability, detailed shop drawing and material-submittal review, knowledge of Saudi Civil Defense and water-authority requirements, and confident coordination with consultants, contractors, BIM teams, specialist suppliers, and site teams

Responsibilities:

• Lead technical-office reviews for plumbing, drainage, domestic water, rainwater, gas, fire-fighting, and specialist suppression systems.

• Perform and audit hydraulic and sizing calculations for booster pumps, PRV stations, pressure zones, domestic hot water systems, drainage fixture units, and stormwater flow rates.

• Prepare and validate fire-fighting hydraulic calculations for standpipes, sprinkler systems, fire pumps, hydrants, pre-action systems, and clean-agent suppression systems.

• Check plumbing and fire-fighting shop drawings, single-line schematics, isometric piping diagrams, sprinkler layouts, pump room details, riser diagrams, and coordinated BIM outputs.

• Assess material submittals, technical datasheets, compliance sheets, and vendor documentation for pumps, valves, pipes, fittings, backflow preventers, hydrants, tanks, and specialty suppression systems.

• Coordinate plumbing and fire-fighting interfaces with architecture, structure, HVAC, electrical, ELV/BMS, fire life safety, BIM, and site teams.

• Ensure technical alignment with Saudi Civil Defense requirements, National Water Company connection requirements, Saudi Building Code provisions, NFPA codes, IPC/UPC principles, UL/FM requirements, and SASO standards.

• Generate and check flushing, chlorination, pressure testing, hydrostatic testing, commissioning, and handover procedures.

• Identify technical gaps, compliance issues, constructability concerns, and interface clashes, then issue clear actions for resolution.

• Participate in consultant/client reviews, authority coordination, technical workshops, and specialist supplier discussions.

Requirements:

• Bachelor's degree in Mechanical Engineering.

• Valid Saudi Council of Engineers accreditation is required.

• Minimum 12 to 15 years of technical-office, plumbing, fire-fighting, fire protection, or mechanical design review experience.

• Strong experience in high-rise, hospitality, mixed-use, large-scale commercial, or complex building developments in Saudi Arabia.

• In-depth knowledge of NFPA 13, 14, 20, 22, 24, 2001, Saudi Building Code plumbing and fire-code requirements, Saudi Civil Defense requirements, and NWC technical connection requirements.

• Experience with hydraulic calculation tools such as Elite Fire or equivalent fire protection software is preferred.

• Proficiency in AutoCAD, Autodesk Revit, Navisworks, CDE platforms, and common document-review tools.

• Proven ability to review calculations, shop drawings, material submittals, method statements, testing procedures, and technical queries with limited supervision.

• Strong coordination and communication skills with consultants, contractors, suppliers, BIM teams, and multidisciplinary project stakeholders.

• Fluent written and spoken English is required; Arabic language capability is an advantage.

We Offer:

• Opportunity to collaborate with a forward-thinking, synergistic, and innovative team.

• Exposure to cutting-edge projects driving Middle East / North African regions development.

• Personalized professional growth and developmental avenues tailored to your career aspirations.

If you would you like to join our highly motivated and very successful team please send us your complete application!