Seegson Security was a private security force operated by the Seegson Corporation. One such team operated aboard Sevastopol Station, under the command of Jake Sinclair. When a lone Xenomorph was unleashed on the station by the crew of the Anesidora in 2137, Sinclair and his men abandoned their posts and formed a violent and dangerous group of survivors, realizing that their chances of survival would increase if they went rogue.
Seegson Security was a corporate security organisation owned by Seegson. They handled facility security and low-level policing. Several text/audio logs imply that Seegson Security ran the docks and provided customs, and it's also likely that they sold security services such as firearms.
A security team led by Jake Sinclair operated on board Sevastopol in 2137. As stated by Dr. Lingard, Sinclair was responsible for allowing the crew of the Anesidora on-board the station after one of the ship's crew members Catherine Foster was attacked and impregnated by a Facehugger and needed urgent medical care. This ultimately led to a Xenomorph infestation breaking out on the station when a Chestburster hatched from Foster.
Out of desperation, Sinclair and his team decided to go rogue and hid themselves in Solomons Habitation Tower, where they tried to seal off all access to the area by shutting down elevators, barricading doors and welding vents shut.
Colonial Marshal Waits wrote an archive log for Sinclair, requesting help in dealing with the infestation. In exchange for Sinclair and his team's full cooperation, he offered to drop his investigation in Sinclair's involvement in the black market trade.
Waits later discovered that Sinclair and his team were shooting civilians, raiding supplies, and taking other survivors hostage. An infuriated Waits recorded an archive log for Sinclair, saying that, "When I find a way to kill this creature, I hope to hell that it found you first."
After Waits and Amanda Ripley finally killed the Xenomorph, Ripley encountered several members of Seegson Security holding a group of civilians hostage. However, as a result of the Working Joes being given new orders to hunt down and kill anyone who poses a threat to the survival of the remaining Xenomorph specimens, a group of Working Joes appeared and attacked them. The operatives immediately opened fire on the Joes, but were quickly overwhelmed and killed along with the civilians, though some may have escaped. Amanda herself slipped away in the chaos.
Much later, Amanda encountered another group of guards (recently betrayed by Sinclair himself, who locked the area down and abandoned them) patrolling Seegson Communications. Ricardo informed her that the group is planning to board the USCSS Torrens and take the ship over by force. While they can't board it currently due to the comms being disabled, he warns her to stay clear of them as they're still dangerous and desperate. Amanda sneaked past the group undetected as they were all slaughtered by a Xenomorph that infiltrated Seegson Communications.
Some time afterwards, Sinclair and his remaining team were ambushed by a pack of Xenomorphs that managed to get into the habitation tower. All of his comrades were either killed or taken by them, including his wife and children, while Sinclair himself was mortally wounded and later died from his injuries.
It can be assumed that any security personnel not at the habitation tower when it was breached by the Xenomorphs later perished when the station plummetted down to KG-348 and burned up in its atmosphere.
Seegson Security officers wore white riot control gear including a white helmet with a translucent face shield and a matching armour vest, both with the word SECURITY written on them. They also wore white, light blue, or black shirts with a Seegson Security emblem printed on the sleeve - as well as grey, blue or black cargo pants with a belt around their waist. They also wore black boots or white sneakers.
Behind the scenes
Originally intended for the game were 'Seegson Private Guards'; various guns for hire that served as additional security and protection for those who could afford their service. Like Seegson Security in the main game, members of this security force were also going to go rogue and "become a law unto themselves" (as stated in The Art of Alien: Isolation), with the Colonial Marshals being "too few in number to impose any kind of order." They notably carried fully automatic firearms in conceptual artwork, something that was also completely cut from the game.
Every Seegson Security member Amanda encounters on Sevastopol is hostile. They are equipped with either a .357 Revolver or a 37-12 Gauge Pump Action shotgun. Their body armor makes them more resistant to damage but they can still be killed rather swiftly.
As with other hostile survivors on-board Sevastopol, if Amanda is spotted from a distance, the security guards will give her a chance to leave. If she refuses they will open fire. If they encounter Amanda much closer, they will open fire immediately.
- Two Seegson Private Guard suits can be found in the Colonial Marshal Bureau, possibly indicating that the Seegson Private Guard still exist in-universe despite their removal.
- The Seegson Private Guard's guns are still referenced multiple times within the files of Alien Isolation as "SMG", hinting that these characters were taken out of the game quite late into development.
- Strangely, if headbitten by a Xenomorph in-game, their visors will remain intact, though a faint blood stain can sometimes be visible on the inside.
- Oddly, some guards' shoulder patches have the San Cristobal Medical Facility emblem, though it's possible that they looted this clothing from other survivors.