Williams

Starfleet commander and aide to Admiral Forrest

A commander at Starfleet Command who works alongside Admirals Forrest and Leonard, present at the meetings with the Vulcans that precede the launch of Enterprise.

Commander Williams is a Starfleet officer played by Jim Fitzpatrick. He appears in Broken Bow, the pilot of Enterprise, and in a handful of later episodes set at Starfleet Command.
In Broken Bow he is among the officers gathered at Starfleet Medical after the Klingon courier Klaang is shot in Oklahoma. He takes Starfleet's side as Jonathan Archer argues with Ambassador Soval's delegation that humans should return Klaang to Qo'noS themselves.
Williams is thereafter seen at Maxwell Forrest's side when the admiral briefs Archer or deals with the Vulcans. The character's name is a nod to William Shatner, matching Forrest and Leonard, who are named after DeForest Kelley and Leonard Nimoy.