The American Historical Association webpage, "Careers for History Majors," is a mini-guide to possible careers for history majors within these categories:
• Historians as Educators
• Historians as Researchers
• Historians as Communicators
• Historians as Advocates
• Historians in Businesses and Associations
"Among the jobs you can consider are: advertising executive, analyst, archivist, broadcaster, campaign worker, consultant, congressional aide, editor, foreign service officer, foundation staffer, information specialist, intelligence agent, journalist, legal assistant, lobbyist, personnel manager, public relations staffer, researcher, teacher . . . the list can be almost endless."
Additional information is available here.
At the AHA site you also will find the informative mini-guide Careers for Students of History by Constance Schulz, Page Putnam Miller, Aaron Marrs, and Kevin Allen.