Americorps
If you are interested in working with Americorps, a Psychology degree is a great start!
You can definitely move from a Psychology degree to a job with AmeriCorps. This non-profit organization is a civil society program supported by the U.S. Federal government, foundations, corporations, and other donors engaging adults in public service in order to help communities. You can find more information about Americorps by visiting their website.
Also, check out the following career category link on explorecareersinpsychology.org that includes Americorps:
Government Supported and Non-Profit Agencies