Transgender Support Group
This community is here to support and help the large population of transgender people. If you or anyone you know identify as transgender, this is the place to share your feelings and experiences and speak with others who are going through similar things in their lives.
And to answer your question, it depends. In some cases after you transition, your coworkers and boss will be very accepting, however may treat you differently, since you are presenting as a different gender. (guys may hit on you lol) But in other cases, coworkers, and or the boss, may not be accepting and fire you, even though its illegal to do so under the discrimination laws.
My advice is to hunt down for a job elsewhere that you know that is accepting of LGBT folk, so that if you do loose your job, your not jobless and have another job lined up. I am sure other's will be here to chime in. But seriously, stop degrading yourself as a person.
Recognize that you are a beautiful person, amazing infact, and you are strong, you coming out about your transgender is proof of that. You deserve good things, and you are worthy of happiness. I am here for you if you need me. :)
Ashley