History Related Job Opportunities
The American Association of Museums http://www.aam-us.org
The American Association for State and Local History http://aaslh.org
United States Office of Personnel Management: http://www.usajobs.opm.gov This site lists all available federal jobs, so you will have to do a subject search.
Links to state and local government jobs: http://www.statejobs.com
Society of American Archivists: http://www.archivists.org