USAJobs.gov - The official federal job site; search for federal jobs by agency, location, job title, etc.
GoGovernment.org - A guide to researching and applying for federal government positions
Careers in Government and Public Service in WA - A comprehensive guide on finding the perfect career for those looking to work in municipal, local, and federal government roles
Government Honors/Internship Handbook - Password changes early fall, so check with CPD for current login information
org - a dynamic nonpartisan, nonprofit organization that works to revitalize the federal government by inspiring a new generation of Americans into federal service and by transforming the way government works
org - Offers not only guidance for federal internship and job seekers but also an opportunity posting board and agency/employer directory. Register for an account on their website, for access. Also be sure to check out the information available on the PSJD Resources page regarding Government Careers, Funding Sources, and Student Loan Repayment.
USA.gov - (A-Z list of agencies)
Senate: Positions in Senators' and Senate Committee offices are posted in a weekly employment bulletin issued by the Senate Placement Office. Senators are not required to post job openings in the bulletin, so not all jobs are posted here, but many are.
House: Join the House Vacancy Announcement and Placement Service (HVAPS) resume bank that Members and Committees can use when filling staff vacancies. Also sign up for the weekly House Employment Bulletin to hear from offices wishing to advertise vacancies - both jobs and internships.
Washington D.C. Area:
Democratic National Committee: Jobs
Republican National Committee: Jobs and Internships
State of Washington - Careers.WA.gov
Washington State Attorney General
City of Seattle - seattle.gov
King County - kingcounty.gov
Association of Washington Cities Jobnet