A pair of articles published during Hillary Clinton's run for the presidency in 2008, one by Northstar Writers Group founder Dan Calabrese and one by Jerry Zeifman himself, asserted that Zeifman was Hillary's supervisor during the Watergate investigation and that he eventually fired her from the investigation for "unethical, dishonest" conduct. However, whatever Zeifman may have thought of Hillary and her work during the investigation, he was not her supervisor, neither he nor anyone else fired her from her position on the Impeachment Inquiry staff (Zeifman in fact didn't have the power to fire her, even had he wanted to do so), his description of her conduct as "unethical" and "dishonest" is his personal, highly subjective characterization, and the "facts" on which he bases that characterization are ones that he has contradicted himself about on multiple occasions.

So he did make a similar comment, but she was not fired nor was he her supervisor. I'd say only partially false, based on Snopes' own story.