As you look through these job sites, you will notice that most of the available positions require quite a lot of experience. Most non-profits and NGO's don't hire entry level employees other than for administrative functions. Don't be discouraged! Read the job descriptions and tag those that sound most appealing. Find an entry-level position in another industry that will serve as the best launch pad to get you into these organizations.
Website designed to network people who want to change their communities and the world by connecting people, ideas, and resources in every possible way.
Job posting for advocacy and think tanks.
Portal links to organizations fighting poverty and hunger
Lists all the United Way affiliated organizations. A great place to start looking for local non-profits and social service organizations.
A searchable and exhaustive website of worldwide NGO's.
Job vacancies at the UN and International Organizations