If you want your employer to buy you one, then I assume DIY kits are out. That does not leave many options, but of those, I'd highlight three:
Kinesis Advantage 2: a well established brand, who know what they are doing. The keyboard has a well, wrist support, and so on. It's also reasonably easy to reprogram it (within limits). A solid choice, and the most recognisable brand, so very employer-friendly.
ErgoDox EZ: a pre-assembled, high-quality build of the ErgoDox keyboard. Comes with an optional tenting kit, and is a split, programmable keyboard. Compared to the Advantage, this can be programmed in much more detail and with a lot more flexibility, and unlike the Advantage, it is a split keyboard, which has a lot of advantages, ranging from being able to place the halves however you want it, to better tenting support.
Keyboardio Model01: Just entering mass production, split, custom sculpted keycaps, also highly programmable.
I have been using an EZ for over a year, both at home and at work, and am very, very satisfied with it. I also have a Model01 prototype, and have been typing a lot on it at home, and love it even more than the EZ. I have never tried an Advantage2, but heard good things about it.
However, the Advantage's programmability is limited (unless you completely replace its firmware), so as far as I remember, you can't have one-shot modifiers. One-shot modifiers are something I learned to love, as they reduced the load on my fingers considerably, and allowed me to put all modifiers on the thumb cluster, moving them under the strongest digit.
In short, if you want something ergonomic, with warranty, buyable by your employer, right here and now, both the ErgoDox EZ and the Kinesis Advantage 2 are solid choices. Which one is better, is up to your needs, I'd say. If you prefer something split, with a better design than the ErgoDox, and don't mind waiting 'till about Q3, then the Keyboardio Model01 would be another option you could choose.