Simpson Markson
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
Captain Simpson Markson was the captain of the civilian ship Argo Navis. He was selected to sit on the Judges Tribunial for the Baltar Trial (TRS: "The Son Also Rises").
Notes
He may be one of the two unnamed captains sitting either side of Captain Tarney, Captain Franks and Admiral Adama, and could be a member of the Quorum of Ships' Captains in Islanded in a Stream of Stars.