DC's Human Rights Act and subsequent regulations are way ahead of the rest of the country.
However there are 9 States and 86 Municipalities and Counties that protect workplace discrimination on the basis of gender identity.
DC has the strongest, but the law passed in 2005.
The first State was Minnesota.
States with gender identity laws: IL, MN, NJ, Maine, New Mexico, California, Washington, DC (even though its not technically a state) and Hawaii
There is a list of cities too.
But of all of them, DC is by far the strongest.
A job in DC, well that is another issue altogether. I wish I could tell you some good advice. The only advice I can give is to get a graduate degree in something related to policy.