You clearly discovered something amazing about Hillary Cilnton’s term at the Department of State: it’s entirely true that she was never subject to an inspector general!!!
It’s too bad most of your information is wrong of bizarrely out of date. (For instance, State got an IG shortly after Clinton left.)
I posted the date of the article for reference purposes. While that article was in 2012, I felt it was important for people to know.
I could find no report of how many vacancies exist now.