M. Howard (flight director)
M. Howard was a Human Starfleet officer in the 22nd century. 

In the 2150s, he was listed as a Starfleet Command officer on the dedication plaques of two  starships,  in 2151 and  in 2154. (, dedication plaque; , dedication plaque)

In January of 2155, he was listed as a Flight Director on a directory placard at Starfleet Command's Fleet Operations Center, Sol Sector. His office was located in room #1037. (, United Earth directory)

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Humans
Columbia dedication plaque personnel
Enterprise (NX-01) dedication plaque personnel
Fleet Operations Center personnel