You will find these guys in Central Production B
near the medbay.
Take your first left after medbay and you will see these guys behind some crates.
I discovered a really simple method
for defeating these guys after numerous attempts.
Use your drone to lure one of guys towards you. Make Sure either his head or body is targetted (really important
He will begin to run towards you, Now sprint towards him
hit RB when you are close (not too close) and you will begin to slide then you will hit . You should notice his health down by significantly provided you targeted a specific body part. Back Off
he will return to his position. Use the ranged drone again as a lure and repeat the slide attack. This allows you to inflict great damage probably 4 hits. Utilise your drone when the energy bar is filled enough and this will also inflict good damage. Repeat this around 4 times.
Here is a clip I used this tactic on the second pair of guards
I was able to take both guys down without losing any health or taking any damage. These guys also drop Gorgon Blueprints
so target the head of the first guy then body of the second guy and hit X when available and try and get these blueprints as they offer great defence and as they permanently die you won't have many opportunities Once one is dead he is permanently removed, so you dont have to kill both at once