Bowen Marsh

Bowen Marsh is a character in Game of Thrones. He is played by Brian Fortune and debuts in the seventh episde of the first season. HBO announced Fortune as playing 'Night's Watch Officer', but according to the actor and other information this is the same role as Bowen Marsh in the books.

Bowen Marsh is the First Steward of the Night's Watch, based at Castle Black. He is in charge of the day-to-day running of the Night's Watch, dealing with issues of supplies, funding, logistics and communications.

Season 1
Bowen Marsh accompanies Jon Snow and Samwell Tarly into the Haunted Forest to witness them saying their oaths of loyalty to the Watch in front of a heart tree. He is among the first to congratulate them on entering the Watch, and is also present when Ghost returns with a corpse's hand in his mouth. Marsh then helps return the two corpses, that of Othor and Jafer Flowers, to Castle Black. He confirms Sam's discovery that the corpses do not smell, which is odd since they appear to have been dead for weeks.

In the books
In the Song of Ice and Fire novels, Marsh is an important and senior figure in the Watch, reporting directly to Lord Commander Jeor Mormont and is just below him in the command hierarchy of the Watch. When Mormont and the rest of the Night's Watch ride out to investigate the wildling menace, he remains in command at Castle Black.