Sniper
Source Player Core pg. 129
You specialize in targeting foes from far away and attacking while unseen. Whether you're peeking around a corner, perching on a distant rooftop, or aiming from the back line of a squad formation, you favor sniper rifles and prefer to line up the perfect shot rather than rush into combat. You're trained in Stealth. You gain a skill feat for Stealth.
Exploit
You ignore the unwieldy and volley trait of guns you wield belonging to the sniper group. You gain one of the following operative feats as a bonus feat: Keep Them in Your Sights or Scope Sight.
Enhanced Exploit9th
If you fail your first ranged Strike against your mark using a weapon in the sniper weapon group, you Reload your sniper weapon as a free action. The Strike doesn't count toward your multiple attack penalty.