Transgender/third gender/nonbinary people are a minority that has at times been marginalized within the LGBT community. The good news is that people who fall under (or near!) the transgender umbrella are increasing in visibility; more and more, their rights are part of discussions by the broader public. For resources on job searching and professional development, see the Hiatt Career Center website (Brandeis University).
If you are at Northeastern University, contact the LGBTQA Resource Center.