Science officer was a posting available on some Imperial Star Destroyers. They were responsible for analyzing scientific data and advising the ship's captain on scientific matters. Lieutenant Deltic was a science officer, specializing in planetary sciences, on board the Imperial-class Star Destroyer Ultimatum in 11 BBY.
Science officer was also a position in the New Republic Starfleet. In the months following the Battle of Endor, the Togruta Niriian served as the Science Officer of the New Republic Carrack-class light cruiser Oculus.