If things like this upset you, you are seriously naive about the operations of your government. As a former Palantir employee, I can say with some confidence that the govt and private company's make efforts to ensure these things remain secret..
Then be a hero and stop using a throwaway maybe? If you are embarrassed or maybe ashamed of your former association with Palantir, don't bring it up or don't get caught working there or both.
I work on similar public healthcare projects where our website mentions the contracts, down to the division. I tell people in meetings I don't do things I wouldn't stand by on public record.
I wouldn't to be honest; they are a whistleblower and unless they manage to get a lot of media attention, there's a chance they'll "disappear" or "commit suicide"; Palantir is a dodgy company with people, influence and interests going very high up.