The evidence they present for that is that she wrote a python library to interact with their websites (or in their words "developed a repository for a python module for interacting with OCLC's WorldCat(r) Affiliate web services"). Also that she worked for a competitor, describes herself as an archivist, and has publicly stated that libraries and archives should be open and publicly available.
It's not exactly convincing evidence that she's involved with Anna's Archive IMHO.