What does northernnorthern offshore do? Northern Offshore, Ltd. is a provider of contract drilling equipment and operating services for offshore oil and gas companies. The Group owns and operates a floating production facility, a semisubmersible drilling rig, a drillship and jackup drilling rigs. In addition, the Group provides rig management services.Why work for northern marine group? Our systems are sophisticated, modern and fit for purpose. Whether you are looking for seagoing or shore-based positions, the Northern Marine Group has a wide range of opportunities available for you.Who is northern energy supply? Northern Energy & Supply has been active in the bunker trading and lubricants sector for many years. Logistics and Recycling. land and sea.