Several internships
Humane Society of the United States (HSUS)
HSUS lists several policy-oriented internships. Some are in Gaithersburg, MD; some are in Washington, DC. There are also animal care internships available. For full details, go to:
http://www.humanesociety.org/about/employment/internships/internships_hsus.html?referrer=http://ensp.umd.edu/internships/internships-policy