Siem Offshore Inc. has decided to streamline its business by forming one dedicated organisation for its core offshore vessel business named 'Siem Offshore OSV'. Idar Hillersøy has been appointed as Head of Siem Offshore OSV and will report directly to the Board of Siem Offshore Inc. Idar Hillersøy has served has CEO of the company's 50% owned affiliate Secunda Canada LLP since December 2012, and prior to that was Chief Commercial Officer at Simon Møksters Rederi.