>”Executive Assistant to the Associate Deputy Director”
So, basically “secretary,” no?
Remember, the federal government hasn't done any serious expanding since 1960 ~ so there was no growth commensurate with an ever greater population ~ and simultaneously electronics displaced most traditional government work. That made having a long title a highly desirable ambition for a certain type of person.
The fellow you want to stand up and salute in any federal agency is the one who can sign "final agency decision". All those other people are just supernumeraries.