How do you suppose they got her photo (and associated it with her identity)? Is there someone at MSG (or their facial recognition vendor) whose job it is to look her up on Facebook (Or her employer’s “about” page)?
Example of a different firm where you can even filter by school: https://www.wlrk.com/attorneys/?asf_l=View%20All
I'd bet she self-identified as being an employee and posted to social media about it.