Need a little help on TalusFollow

I am currently in the Rebel Investigation Quest on Talus. The task I am trying to complete is killing the NSH Sargeant who apparently is on the lower level of the bunker I am in. There is a fence with a security gate of some type that I just cannot find the key to opening. The elevator to the lower level is on the other side but the fence has proven to be quite the obstacle. How do you get through the fence? Any advice would be very much appreciated.