American Public Health Association http://www.apha.org/professional-development/public-health-careermart/
Association of Schools and Programs of Public Health http://www.publichealthjobs.net/
Association of State and Territorial Health Officers https://govphcareers.astho.org/jobseekers/
Centers for Disease Control http://www.cdc.gov/employment/recruitment/
Emory Public Health Employment Connection https://apps.sph.emory.edu/PHEC/
Federal Government - General Employment http://www.usajobs.gov
National Association of County and City Health Officials https://www.naccho.org/about/work-with-us
State and Local Health Departments -
Non- civil service - Search google.com for the health department in the area you are interested in and contact them directly.
Civil service - Search Google.com for the civil service agency for the area you are interested in and follow the directions.
Some agencies are now using https://www.governmentjobs.com/
Veterans Administration http://www.vacareers.va.gov/index.asp
Send suggestions for additional sites to firstname.lastname@example.org