Quoteit sounds like it is mostly men and we all now how slow and un-observant they are,
Why, thank you very much. Always nice to be appreciated. Now, as a slow and unobservant person, my I point you towards my fast observation concerning your use of the English language?
Sorry, had to bitch about that one.
As for coming out: Well.. I'd say I'm with Cindi, on this one. I don't know at what age you wish to retire, but be it sixty, you'd just have to wait a two years or so. Two years in which anything may happen, and if people then suspect you to be TG, well.. Be open about it then. After all; if they don't know, it dun't harm, right? And if they do suspect, they must at least know something about it, so then you can at least enter conversation.
While all this may be happening, your clock keeps ticking. Now; I'm from the Netherlands, so I don't quite understand how gender, and changing thereof, could get you fired. I do know that denial will make people pissed off, but not telling won't. If they then ask you why you never said, you can answer with them not having asked.
So I say: Don't throw it on the long board, but don't outright deny it, either. Just let it pass.
Now, I know I'm inexperienced in this sort of thing, but people do take lies seriously. However, most people also appreciate silence, things not said about personal lives. They'll respect silence, but not lies.