Oil and gas engineering services firm Plexus Holdings has won a new two year contract with a one year extension option with Wintershall to supply its POS-GRIP wellhead technology and mudline suspension systems.The group said revenues are expected to commence January 2010, but didn't comment on any further financial details of the agreement.'Plexus has built a strong presence in the North Sea oil and gas markets, with an increasing number of leading international oil and gas companies using our systems,' said chief executive Ben van Bilderbeek.'We are delighted that Wintershall continues to appreciate the technical, performance and cost saving benefits of our POS-GRIP technology and look forward to continuing to work with its team over the coming years.'