Of the employees in the basement warehouse of the Commonwealth regional headquarters of the Vault-Tec Corporation, Mr. Scott was one of the first there to notice irregularities in their supply shipments. On October 7, 2077, he informed his colleague Martin Reid – who was already suspicious from the fifteen crates of psycho and jet to Vault 95 – of another massive and dubious shipment, marked "Vault 111 - DO NOT OPEN". Out of curiosity, he opened it and to his (and his colleague Mr. Reid's) perplexion it was hundreds of gallons of liquid nitrogen, something that the vault wouldn't normally need. This discovery compounded Mr. Reid's (correct) belief that the vaults in the Boston area were actually built to be experiments on their inhabitants, rather than to protect them as advertised.
Mr. Scott, concerned for his fellow coworker, advised him not to keep bringing this to the attention of their boss, Frank Davidson, remarking on how he witnessed the assault Mr. Davidson committed against a different colleague, Roger, who was standing close to Mr. Davidson while taking a shot at the pool table in the lounge. Mr. Davidson believed that the only corrse of action was to crack Roger over the head with a pool cue, causing long term hearing loss in Roger's right ear.
The highlight of Mr. Scott's day at work was lunch, which he went upstairs to the lounge and socialized with Sharon, a fellow coworker. This came to an end on October 17, when – unaware of exactly how unstable and dangerous their boss truly was – Mr. Davidson killed her from some perceived minor slight against him. Her disappearance for a couple of days without notifying anyone was out of character and he worried about her, not knowing about the conflict between her and Davidson.
Walter Scott is mentioned only in Fallout 4.
- His terminal is located on his desk in the basement.
- Vault-Tec regional HQ terminals; Dr. Reid's Terminal, 09/29
- Vault-Tec regional HQ terminals; Dr. Reid's Terminal, 10/07
- Vault-Tec regional HQ terminals; Mr. Davidson's Terminal, 10/02
- Vault-Tec regional HQ terminals; Walter Scott's Terminal, 10/15
- Vault-Tec regional HQ terminals; Walter Scott's Terminal, 10/19