Louvier
Louvier was a 23rd century male Federation Starfleet officer who served as chief engineer of the  in 2257.

For some time prior, Louvier had warned Captain Christopher Pike about the holographic comm system Starfleet was using. Due to cascading system failures with this, Pike ordered Una Chin-Riley to have Louvier strip the system from the ship, in favor of "good ol' fashioned viewscreens." Number One had told Louvier that Pike thought holographics looked too much like ghosts. 

Captain Pike once commented that he didn't think Enterprise would have a chief engineer more in love with his ship. ()

By 2259, Louvier was superceded as chief engineer by Commander Hemmer. ()

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Individuals
Starfleet operations personnel
USS Enterprise (NCC-1701) personnel