As the aging baby-boomers near retirement, federal and state agencies have hundreds of thousands openings. In this article by Time various government agencies are facing a continual need to replace these retiring workers and the Fed. is ramping up its hiring. Federal jobs may be applied for here: http://www.usajobs.opm.gov/
The CIA has just restyled its web site to draw more applicants and can be applied for here: https://www.cia.gov/careers/index.html
Openings are also available at state and local levels.