Etnam held the ranks of both fleet officer and admiral within the Imperial Navy.
Approximately around the year 5 BBY, Etnam commanded the Star Destroyer responsible for the capture of Adalric Cessius Brandl. This Star Destroyer, under Etnam's command, operated as part of a task force that also featured the Interrogator, with Etnam reporting directly to the Inquisitor Antinnis Tremayne. Brandl was escorted to the bridge for a one-on-one interview. Following this meeting, Etnam experienced a significant shift in his perception of Brandl, which was probably due to a mind trick employed by Brandl. Subsequently, Etnam granted Brandl the freedom to move about the Star Destroyer without supervision.