A resident of Vault 34, he and three others were trapped when someone detonated a bomb in the swimming pool area. They left an SOS in the terminal outside the reactor room of the vault. Rescuing these survivors is one possible choice during the quest Hard Luck Blues. He is the de facto leader of the small group of survivors. All of them wear Vault 34 jumpsuits. They can be killed without loss of Karma.
If the player character talks to Horowitz at Aerotech suite 300, he will tell them that his group is glad to be freed from the vault and is excited to learn more about the surface world. They also mention that the NCR officer in charge of the office park accepted their group and offered them free food and shelter. The player character has the option of telling Horowitz that they were the one who freed the dwellers. If the player character does so, the dwellers will express their thanks.
PCPlaystation 3Xbox 360 After the Vault 34 survivors appear in the Aerotech Office Park (assuming the player character chose to save them), speaking to Horowitz will provide a dialogue option for a reward, called a "Vault Trinket". However, no item is added to the inventory if this dialogue option is selected, and there is no indication within the game's code as to what this item was intended to be. [verified]
PCPlaystation 3 Sometimes Horowitz and the rest of the Vault 34 dwellers will not spawn at Aerotech and even if they were saved, attempting to use the console commandplayer.moveto RefID may not work. The Courier will be teleported to the location within Aerotech (Aerotech suite 300), but it will be empty. The only way to fix this is to target each non-player character with the console, enter prid RefID and activate for each of them individually. [verified]
The survivors will not be enabled until two in-game days after the end of the quest, so their immediate absence isn't necessarily a bug.