Through the efforts of several Posse members, supplemented by the work of the staff at the Posse List, we have compiled sources and links to finding government jobs. The favorite method appears to be searching http://www.usajobs.opm.gov but our friends at various government agencies and bodies told us not all jobs are listed on that site.
So, some intrepid Posse members who were looking for government or NGO jobs (and found them) cataloged their sources and sites. 98% of the work was done by them.
For the full list click here.