loader image


Development of ideas into service excellence


CSS Subsea is part of the Company Services Swiss SA Group and provides a comprehensive range of underwater services for the offshore and onshore market.

Targeting service segments and geographical markets in which our competitive edge helps to ensure attractive projects.

Shallow and deep-water interventions. Trenching, burial/de-burial, and protection services for offshore cables and pipelines.

Consolidating our position in those regions where CSS Subsea is historically operative and familiar: Mediterranean and Red Seas, Persian Gulf, Far-East.

Expanding into highly attractive regions with a focus on: West Africa, Latin America.

Maintaining a range of ancillary activities which sets us as a reliable full-service marine contractor at the leading edge of industry development.


The right resources, at the right time, in the right place.

css subsea diving services


CSS Subsea operates as a worldwide underwater service contractor and as per IMCA standards for Surface Supplied Diving, Saturation Diving, ROV Operations, and Survey.


CSS Subsea offers a proven track record of more than 7,000 hrs of ROV Operations, 800 km Pipelines inspection, and over 20 Diving Projects successfully performed.

CSS Subsea ROV
CSS subsey survey services


Throughout the years, CSS Subsea has gained valuable skills and experience in hydrographic and geophysical survey management.


Over the years, CSS Subsea personnel has earned extensive experience in pipelines and cables trenching, de-burial, and protection services.

css subsea trenching service


With a passionate commitment to always improving the services quality to our clients in an innovative and safety way, we believe in: Collaboration, Accountability, Innovation, Respect, Responsiveness, Sustainability.


To solve your challenges we do things differently, smarter and more competitively.


Being our clients referent point improving quality and reducing environmental footprint through our customized and innovative solutions for the underwater services.


We benefit from International Quality System Certifications.



We benefit from a healthy and diversified client portfolio​.

clients css subsea

CSS Subsea is an international leader within its segment, with a comprehensive service offer for the installation and maintenance of offshore structures.

CSS Subsea is equally committed to service quality and safety, demonstrated by strong in-house R&D capabilities, its “centre of excellence” for trenching technology, compliance with IMCA regulations, and DNVGL ISO 9001, 14001, and 45001.

Being a long-term service provider to several major international Oil & Gas operators, CSS Subsea is renowned for service quality, professionalism, and reliability.

The Group has a successful track record from operations in the Mediterranean Sea, North & West Africa to the Middle-East, and now also in Latin America.

CSS Subsea’s leading position as a provider of unique and highly technical solutions & services such as post-trenching and NDT.

CSS Subsea’s management leverages extensive industry experience and the support of a dedicated workforce of more than 100 highly qualified employees.


Company Services Swiss SA Group technical and commercial responsiveness is happy to receive your enquiry and reply in the shortest lead time.