In fact, Media Trackers confirmed 43 employees in the Milwaukee County DA's office signed the recall. Among them:

Perhaps one of the most interesting employees at the Milwaukee County District Attorney’s office who signed the Scott Walker recall petition is Janet Oelstrom, a secretary for the Public Integrity Unit. The Public Integrity Unit is responsible for anti-corruption probes and the now-familiar ‘John Doe’ investigations. Oelstrom confirmed to Media Trackers on Friday night that she did indeed sign the Walker recall.

Revealing these signees is driving the left nuts, with some even crying McCarthyism. Nonsense. When you sign a public document you are PUBLICLY affixing your signature to it. It's stunning to me how many people don't know that.