Eclipse Security Guard

The Eclipse security guards are a pair of Eclipse mercenaries that make an appearance in Kasumi: Stealing Memory. The first one is guarding the entrance to the mansion of Donovan Hock while the second one is guarding his private rooms.

When attempting to crack Hock's vault with Kasumi, one of the requirements is to acquire Hock's DNA samples. In order to do that, Shepard must get the voice modifying device from the security office and collect a datapad mentioning Chief Roe. Once these two things are in Shepard's possession, he can tell the security guard that he has authorization from Chief Roe to enter the private rooms and Kasumi will use Roe's voice to confirm that. By going this route, you never have to fight the security guards. However, if you talk to the guard before obtaining the voice device, Chief Roe will tell the security guard that you do not have authorization. This forces you to sneak in to Hock's quarters from the back. After you acquire the DNA samples, Shepard finds the two security guards investigating the window that he broke. Aiming to not get caught, Shepard takes out the security guards and continues the mission.

Tactics
Eclipse security guards have no armor or shields and wield pistols. They are easy targets.