Zachary "Zach" Watson was a resident of Sevastopol Station. When a lone Xenomorph was unleashed on the station by the crew of the Anesidora in 2137, he became one of the survivors desperately waiting for rescue.
Zach was eventually killed through unknown means during the Xenomorph infestation.
On Sevastopol Station
Zach was apparently an alcoholic as he was described as a "wasted asshole" by Turner in an audio log. His drunk and disorderly behavior resulted in him being arrested several times by the Colonial Marshals aboard the station.
Watson would run into further trouble with the Marshals during the Xenomorph infestation on the station in 2137. While under the influence of alcohol, Zach damaged a door with a Maintenance Jack. Before he could do any further damage, he was caught and arrested by Turner, who proceeded to throw him inside the evidence lockup and let him sleep it off.
On December 8, an intoxicated Watson recorded an audio log in which he condemned Marshals for their role in the breakdown of society aboard Sevastopol, angrily stating that they're "supposed to be protecting us". In the same log, he theorized about the existence of the creature on the station, citing the security braces on doors across the station as the reason for his suspicions.
Zach was eventually killed through unknown means sometime before December 11. His corpse, still holding on to a Maintenance Jack, was later discovered by Amanda Ripley, who took the Jack.
Watson was armed with a maintenance jack, which was claimed by Amanda following his death.