Matthias Ploch

Allseas Group SA provides offshore pipeline installation and subsea construction services. Its other services include project management, engineering, and procurement. The company was founded by Edward Heerema in January 1985 and is headquartered in Châtel-Saint-Denis, Switzerland.

Ceona Services (UK) Ltd. provides subsea construction services to field operators. It engages in the installation of subsea infrastructures, including flexible, rigid risers and pipelines, in-line infrastructures, umbilical, templates, deepwater floating facilities, spars, FPSO/FPUs and mooring lines. The firm also offers subsea controls, separation and storage, tie backs, EPS and provides subsea integrity management services, which include inspection, repair and maintenance, survey, brown field subsea upgrades and decommissioning. The company was founded in 2011 and is headquartered in London, the United Kingdom.