The company was formed in 2000, Halul Offshore Service Co. W.L.L,a 50:50 joint ventuer between Qatar shipping and Qatar navigation (now wholly owned subsidiary of Qatar Navigation), is the Qatar's largest provider of Offshore support services.
Committed to the principles of operational excellence safety and highest quality customer service, HOSC provides services to major local and international oil and gas exploration companies, covering the construction, maintenance and diving sectors. Equipped with the latest technology development the dynamic team of trained and efficient professionals of HOSC are committed to conduct business in a socially responsible and ethical manner. HOSC currently owns and operates a diverse fleet of Oil & Gas Industry support vessels; the fleet has been subject to expansion and replacement over the recent years and places HOSC as a prominent supplier of support vessels in the area. The fleet while being predominately young is listed below by class:
| Diving Support Vessels | 3 Nos. (1 under construction) | |
| Safety Standby Vessels | 8 Nos. | |
| Anchor Handling Tugs & Platform Supply Vessels | 13 Nos (3 under construction) | |
| Work Boats/Maintenance Vessels | 8 Nos (2 under construction) |
