And I also like to go Scouts. Since Sicarious himself is in the scout section of the codex, and follows every other rule. He's legal, and with his ability to give his BS6 to anybody (Probs a Heavy Bolter) you can make quick work out of little weak brute squads.
EDIT: Also Sicarious can pick out targets.
Boss Goon? Headshot?
Think you might be talking about Telion there, Sicarius is the 2nd(?) company captain.