S. Welke was a Human Starfleet officer of the 22nd century.
In the 2150s, he was named as a Starfleet Command officer on the dedication plaque of NX-class starships. (ENT: "Broken Bow", dedication plaque; ENT: "Affliction", dedication plaque)
In January of 2155, he was named as a Mission Operations officer on directory placards at Fleet Operations Center, Sol Sector. Welke's office was in room #1067. (ENT: "Demons" set artwork)
He was named for co-producer Stephen Welke.