In what at first glance may seem too good to be true the The U.S. Equal Employment Opportunity Commission has ruled that transgender people are protected by vitue of our sex from workplace discrimination under Title VII The Grandmother of Equal Rights Laws!
Title VII prohibits not only intentional discrimination, but also practices that have the effect of discriminating against individuals because of their race, color, national origin, religion, or sex.
Source: The U.S. Equal Employment Opportunity Commission Federal Laws Prohibiting Job Discrimination Questions And Answers.
Title VII's broad prohibitions against sex discrimination specifically cover:
Sexual Harassment - This includes practices ranging from direct requests for sexual favors to workplace conditions that create a hostile environment for persons of either gender, including same sex harassment. (The "hostile environment" standard also applies to harassment on the bases of race, color, national origin, religion, age, and disability.)
The Transgender Law Center blog statement:
San Francisco, CA) - In a landmark ruling, the Equal Employment Opportunity Commission (EEOC) has announced that Title VII, the federal sex discrimination law, protects employees who are discriminated against because they are transgender. In its unprecedented decision, the EEOC concluded that “intentional discrimination against a transgender individual because that person is transgender is, by definition, discrimination ‘based on … sex’ and such discrimination … violates Title VII.” The EEOC is the federal agency that interprets and enforces federal employment discrimination law, and today’s decision marks the first time it has offered clear guidance on this issue.