SH Sub Branches

They are the room maker and the burst damage god. You are specialized for close combat and quick elimination. You to be in the front with maulers. You are equipped with  A shotgun that is good at burst damage. For your sidearm you get a SMG that's good for taking down weakened targets that have been hit by your main gun. This may be obtained at PFC 

They are the heavy's of SH. You are equipped with A LMG that has 100 round mag and deals a lot of damage. You will be behind breachers when they clear rooms, You are to be trying to tank damage. You have a rifle as a more medium range weapon.
This may be obtained at SGT 

SH Watchers are Serpents hand long range specialists. Stalkers are equipped with the UMP-45 for close range defense and for their primary they get the Remington MSR. They are to be in the back and target high health targets to quickly take them out.
This may be obtained at PVT