Easy solution (Score 1)

I know, it won't help this time. But next time, there is a very easy solution. Knowing you will soon use it at work, first develop it as free software, and commit it Sourceforge or wherever. Now that it's 100% free under LGPL (to avoid company complaining about viral GPL) pull it into your project codebase. If you feel paranoid, dissociate your real name from the Sourceforge user name.