Hi J.. I have some tips for you, and I hope it helps.
Since you work full time, start the new sleep process on a Fri. Your LO has been sleeping with you both for 5 months, so don't expect this to work in a week. You may be sleep deprived for a couple of weeks - even more so - but then things will get easier for all of you.
If you work on this issue sometimes, let her sleep in your bed sometimes, sometimes not, etc, and go back and forth - it will NOT work. you MUST be consistent, patient and diligent! BUT this will allow for little if any crying.
Bring a blow up bed, or futon or whatever it is into HER room. Sleep with her there for a few nights.
After she gets used to that, put her in her crib, and lay down next to her. I used to use a stool, sit on it, and lay my torso down in my LO's crib. Once she falls asleep, sleep on the blow up bed so when she wakes and starts crying you can comfort her. Once she starts getting used to that - go back into your own bed! When and if she wakes at that point, go to her, rub her back, say good night and leave the room. You might have to go in and out several times, or sleep on her floor again until this works.
It will take a couple of weeks, but stick to it, and good luck!