Sergeant Snowman is a member of Bravo 9 and is a playable character and the secondary protagonist in Call of Duty 4: Modern Warfare (Nintendo DS).
The first mission Snowman appears in is "Intervention". He and the rest of Bravo 9 were sent to secure a nuclear device on a cargo ship. On the mission, he had to destroy the communications tower, disable two bombs, and secure enemy intelligence. Even in these efforts, the nuke was taken away by a hostile helicopter. After the mission, he was sent to Russia to take hostage Ivan Petrovitch, a major Ultranationalist leader. When Ivan is captured and interrogated, he gives off the position of a major base. Bravo 9 is sent to recover enemy documents inside the base. And then, after further interrogations, Ivan finally gives off the position of the nuke from the mission "Intervention". It was located in a ship yard awaiting transport. After fighting his way to the nuke, Snowman finally disables it. It no longer poses a threat in the game.