| Company Name | Core Service | | :--- | :--- | | | Oil & Gas EPC | | Larsen & Toubro (L&T) Saudi | Heavy engineering and construction | | AlRushaid Group | Multiple services (Construction, valves, trading) | | Jubail Energy Services (JESCO) | Catalyst handling, high-pressure cleaning | | Mowah Company | Facility management and industrial services | | Bilfinger Saudi Arabia | Maintenance and industrial services |
Technically the authority, not a company, but no list is complete without the RCJY. They manage the infrastructure, utilities, and land allocation. Companies must register with the RCJY to operate inside the city limits. jubail industrial city companies list