A Cargo Ship Security Guard is responsible for protecting a vessel, its crew, and its cargo from threats such as piracy, theft, and unauthorized access. Duties typically include monitoring surveillance systems, conducting patrols, enforcing security protocols, and sometimes escorting high-value shipments. These guards may work for private security firms or as part of a ship's crew. The job often requires training in maritime security, firearms handling, and emergency response. Depending on the route, guards might also coordinate with naval forces or port authorities to ensure safe passage.