THALASSA HOLDINGS was established in Piraeus in 2018, in order to covering a wide range of Diving & Marine Services, as per Offshore & Maritime Industry requirements, as well as to covering the needs of its Clients around the globe, following HIRA guidelines & HSE/IMCA code of practice.

THALASSA HOLDINGS is also managing a number of different companies, in order to expanding the range of the activities, reducing the risk, improving the assets & investing to the new technologies, always by protecting the marine environment and the property at sea.

Since 1998, having its fist Project in Motor Oil Hellas, regarding the underwater inspections of Refinery Facilities, THALASSA OFFSHORE keeps providing services in a numerous Offshore Oil & Gas Operations by supporting Offshore Renewable Energy Resources, Offshore Drilling Rigs, Production Platforms, Pipe-lay & Trenching Barges, Pigging & SPM (including Surface Oriented & Saturation Diving, DSV & ROV services).

Since 1998, having its fist Project with Tsavliris Group, regarding the underwater repairs of grounded vessel, THALASSA SALVAGE keeps providing services in a numerous Marine
Salvage & Wreck Removal Operations by supporting the Major Salvors in the world (including Heavy Lifting Operations & Oil Spill Response).

Since 1996, having its first Project with Siemens, regarding the underwater works of Fiber Optic Cable Interconnection of Rhodes, Karpathos & Crete, THALASSA SUBSEA keeps providing services in a numerous Subsea Cables Operations by supporting the Major Subsea Cable Manufacturers & Contractors in the world (including Power & Fiber Optic Installations, Repairs, Maintenance, Protection, Engineering, Survey, UXO & ROV Operations).

Since 1993, having its fist Project in Indonesia, regarding the in-water hull cleaning of VLCC "SAPPHIRE", DWT 392798 Tons, THALASSA DIVING keeps providing services in a numerous Commercial Diving & Marine Operations (including ship maintenance/repair/survey works & port/harbor works & civil engineering).