Executor - Comparable to human Generals. The Executor is one of the highest ranking officers in the Paragon Empire.
Vindicator - Vindicators are any type of Paragon soldier, only having recieved a commendation of expertise. They're usually in command of a group of Paragon on certain missions or otherwise.
Stalker - Elite operative and stealth expert. Usually works alone, but groups of 3 and 5 are also common. The way to identify a Paragon Stalker is usually in the colortone of it's suit. Most Paragon suits are plain metalic, wether it be a regular Trooper or an Executor, however the Stalker's armor has a slight blue tint to it, aswell as a different design of suit-helmet. They are also capable of dangerous tasks that not even an entire squad of troopers could accomplish.
Lieutenant - Noticable from the small light-green tinted logo on it's shoulders and larger size. The Lieutenants usually command a small group of Paragon muchlike the Vindicators, but are considered lower in rank. Sometimes, several lieutenants and their teams can be under the command of a single Vindicator. The difference in the Lieutenant's suits and a regular Trooper's suit is that it's alot like a Stalker, minus the full-body cloaking system. They have enhanced strength and speed, making them fully capable of jumping from wall to wall of building. They are also alot bigger than regular Paragon.
Trooper - The meatshields of the Paragon. Has no strength enhancement or special abilities other than the technology built into their suits (such as binoculars and certain scanners and comm-systems) and isn't exactly the strongest one can come across. Even though one Paragon Trooper counts as two Human soldiers, they're considered weak on their own. In numbers, however, they're almost unstopable.