If I told Zack once, I've told him a thousand times... stop using the higher amperage ballasts in the lighting grid on B Level. They will overheat within days and blow out because the power taps up there weren't installed to spec.”— Carl Maynard
Zack Foxworthy was an engineer in Vault 92.
Carl Maynard, another engineer in Vault 92, mentions in the vault's Engineering Logs that he had to fix a problem with ballasts in the lighting grid on B Level due to Foxworthy not having installed these according to specification.
Zack Foxworthy also patched a problem with the vault's air conditioning system. The waste disposal dumping system and the air conditioning ducts were parallel routed and when in some places the ductwork started to corrode, it spread to the waste pipes - which in turn caused waste products to leak into the venting. The resulting smell was carried into some of the men's dormitories.
Zack Foxworthy is mentioned only in Fallout 3.