The reason she hasn't been mentioned post-mansion is probably because Capcom has yet to decide if she died in Raccoon City or not. If they need her to come back as a plot device in the future - much like Sherry in RE6 - it wouldn't be favorable to them to have previously released a file saying she died in the nuking of Raccoon but, as of right now, they have no immediate use for her and are so content to ignore the character's existence as a whole.
As for your original question, if she is alive, she very well could be but, given her characterization and personality, I myself see her working more with groups like Terra Save than the BSAA. (But that's just my opinion.)