Squaddie:
Lightning Reflexes - The hit chance of reaction fire against this unit is reduced by 90 percent for the first shot, and by 70 percent for additional shots.

Corporal:
Holo Targeting - Any directed primary weapon shot, hit or miss, will mark the target, increasing your squad's aim by +15 against this target.
Executioner - Confers +10 aim and +10 critical chance against targets at or below 50% health.

Sergeant:
Conceal - When the squad is revealed, this soldier remains concealed. Once per mission, immediately enter concealment.
Lightning Hands - Slash your sword/fire your pistol at the target. This attack does not cost an action. 4 turn cooldown.

Lieutenant:
Battle Scanner - Two uses of the Battle Scanner ability per mission.
Flush - Fire a shot that encourages enemies to move. +30 aim. -50% base weapon damage. Uses 2 ammo.

Captain:
Assassinate - Your attacks will not break concealment if they kill the target.
Hit and Run - Your first attack of each turn against an uncovered or flanked target does not cost an action.

Major:
Awareness - The soldier pays close attention to their surroundings, detecting the presence of nearby enemies. 10 tile radius.
Smoke and Mirrors - Allows one additional use of all equipped support grenades during each mission. It also increases charges from Smoke Grenade and Battle Scanner perks by 1.

Colonel:
Ghost - Greatly reduces the Scout's detection radius by enemies while concealed. -50% detection radius.
Reaper - Your kills with a sword or pistol refund your action points for the turn.

Sergeant GTS (All Soldiers):
Recon - All soldiers gain +1 tile of vision.

Captain GTS:
Low Profile - Scouts treat low cover as high cover.