Carl Maynard

 was the chief engineer of Vault 92.

Background
Maynard and Parker Livingsteen were working on cleaning up a leaking signal corrupting the recording, though neither identified it as the white noise. Maynard's logs revealed that an underground lake or spring had applied pressures to the buried walls of the vault until they had caved in, flooding the entire bottom level. It is through this breach that Mirelurks came to infest the vault.

Appearances
This character is mentioned in Fallout 3 but does not actually appear in the game. His logs can be viewed at a terminal in the sub level of Vault 92.