The international schools affiliated with the Department of State are independent, non-government institutions. Since they are not controlled by the U.S. government nor do they operate under any official administrative jurisdictional umbrella, they hire teachers and staff directly, establishing their own qualification standards and application procedures. Salary levels and benefit packages vary from school to school. The Worldwide Fact Sheet will give you additional information on them and statistics on number of teachers and students in each geographic region.
Many of the American-sponsored schools overseas contract with private organizations in the United States to assist in the professional staff recruitment process. The schools frequently send representatives to stateside teacher "recruiting fairs" to locate qualified staff for anticipated vacancies.
In addition to communicating with these organizations, you may wish to correspond directly with schools that match your specific interest. You may also want to check the schools' web site as many now list recruiting information and their vacancies. For this purpose, you can connect to these schools via Schools by Regions.
The Department of Defense, a separate U.S. Government agency, operates a school system for the benefit of dependents of U.S. military personnel stationed overseas. Recruitment of teachers for schools at military bases overseas is handled by the Department of Defense, Office of Dependents' Schools.
We hope this information proves to be useful. Please accept our best wishes as you pursue your search for a satisfying position in international education.