Odfjell staff have transferred to Archer for work on a number of Norwegian platforms.
The move comes after the company lost drilling contracts for five Statoil platforms to Archer on the Snorre A, Snorre B, Visund, Sleipner A and Njord.
The transfer was initiated on October 1st but the move was revealed by the firms involved a few months ago.
According to reports,the agreement covers around 290 staff members.