Pomsky is a Marine Vice Admiral and one of the nine that took part in the Egghead Incident.
He is a burly man, donning a dark double-breasted suit, a Marine coat draped over his shoulders, black sunglasses, and a Marine cap. He has wavy light hair, a handlebar mustache, a scar on his left cheek, and a cleft chin.

(Source: One Piece Wiki)