These are usually used for guarding important places that belong to the combine. They have high-preformance weapons and they are more well trained. They are usually equipped with the same weapons as the normal overwatch soldiers, but have better armour and more ammunition. Unlike the normal overwatch soldiers, they are all completley synths.
They are not too quick, but are somewhat skilled in hand-to-hand combat. They are sometimes the leader of normal overwatch soldier squads, and if so, they will have a stronger, more expensive weapon than any other soldiers in the squad.