A scout trooper commander commanded the scout trooper forces on forrested planets (mainly Endor).
History: When the Empire established their base on Endor, they needed commanders to command the scout troopers scoutting the area. (The officers in the bunker were tired of having to go out and walk through plants, weeds, bushes etc. with their normal cloth suits. That's how the scout trooper commander was born!)
About: The scout trooper commander carried a DX-15 sniper rifle as their primary weapon and an E-11 as their back-up weapon. They also direct contact with the bunker. Because of their high-grade and high quality communication devices, the trees did not muffle the message.
Scout trooper commanders usually commanded a squad (unlike their name suggests).
They still rode speeders with their squad and fought just like any other scout trooper.