In my current situation where it is impractical to be 'out' at my current work.  Being on hrt my chest is going to man fail me eventually which is not ideal at the moment.  I have heard a rumour that chest binders may damage developing breast tissue.  If there is any merit to such a claim, are there any effective alternatives to disguising my lovely new little tits.

Well, binding can indeed damage or hamper development. But the main point probably is how big they are and do You really need to bind them? I had to undergo chest X-ray several months ago and binding was the only option (I went with elastic bandage tape) - it was on for about 40 mins and was not a pleasant experience (though I suspect the radiologist did figure it out anyway, considering some of her advice which she gave me...). But I have learned that if they are small (and I have kinda A cup - the one when You dont even need a bra) and if You dress with several layers, people wont notice anything,, especially if people are used to know someone as a "guy" there would hardly be any necessity for them to "look for bewbs" - it would not really make sense. The trick is to wear the first layer tightly and the second one one size larger than You would normally need. It kinda does the trick, providing that You avoided items with chest pockets (these make even smaller bewbs to stand out) and tartan pattern dress. Ideally, You should go for either blank pattern or vertical (not horizontal) lines.

Genetically I am in for a sizable bust. 

Quote from: Zoe the Obscure on June 03, 2015, 01:54:26 AM
Genetically I am in for a sizable bust.

Which means...?
That You have theoretical and vague prospects for having a D cup? Well, I would try to be bold enough to assume that You do not have a D cup atm, so how about dealing with actual issues instead of worrying about future (which might be quite different from expected)?

Binding definitely can damage even developed breast tissue, as trans men can tell you; odds are that it's even more likely to cause harm in breasts that are still growing.

Personally, I was able to hide up to 42C (same cup volume as 40D or 38DD or 36DDD) with a combination of a snug cup-less sports bra, loose undershirt, and loose shirt open a couple buttons over that. People see what they want to see, and the trick is not to hide the size of your chest but to hide the telltale shape - yes, the price was that I dressed and looked like I was a couple sizes larger all over, but it worked.

Wear a good sports bra with no padding and hunch over.  From the looks of the flannel in your avatar, I think you've already got the right dress style to hide them as best you can.  If they get too big of course, you'll have very few options.  Maybe come up with something "medical" that will explain it away that you can tell your coworkers.  Gynecomastia could be brought on by other things.

Well, I don't know at what age you're starting, but I assume over 25+ if you are already working. Be careful because, unfortunately, as trans women we often have smaller cups than our moms and sisters, especially if started late. If you're over 40 or 50, you would be lucky to get a small A cup, due to years of testosterone exposure. I know a trans girl who started at 17, and never got beyond an A cup, while her mom was a DD. I also know another who also started 17, and ended up with a 40D, while her mom was a 36B, so it really varies, but she had gynocomastia before hormones. It really depends. Bindage can also hinder your breast growth, so be careful.

"Wear a good sports bra with no padding and hunch over.  From the looks of the flannel in your avatar, I think you've already got the right dress style to hide them as best you can."

LOL.  I don't normally dress like the Log Lady from Twin Peaks.

It sounds like a sports bra and good luck are the best options.  At least until I can begin a whole new career from scratch.

I find a good stretchy T-Shirt like these: http://www.jockey.com/catalog/product/jockey-seamfree-crew
works well to keep the girls from flopping around too much.

You might as well get used to them.  Once you get a visit from the titty-fairy, she will never take them back.

I like the titty fairy, however,  I left my masculinity under my pillow when I was little and she never showed up.

Loose is your friend. Binding is painful for me. So I just don't even bother anymore.

There is a company called Frog Bra, and their products are widely used by female athletes down here in Louisiana. It seems they do a great job of keeping everything put and providing a non-uniboob in the center look. They have had some issues with keeping up with demand lately it seems. BUT....try a site called "Title Nine", all for the female athletes.

Benefits are that they items are designed for the muscular form, so it's not all skimpy straps and such.

I's also suggest GC2B. I know, "binder", but wait a moment. It's not the same as the chest crushing compression of an underworks. And if you are trying to disguise rather than squish into oblivion, even the size up from what their chart says might work.