Complex sentence: Inspectors of finance are mainly recruited after graduation from the École Nationale d'Administration (the French national school for high ranking civil servants)-working for the inspection is often one of the top choices of graduates.
Split into simpler sentences: Inspectors of finance are mainly recruited after graduation from the French national school for high ranking civil servants, the Ecole nationale d'Administration (ENA). Working for the inspection is often one of the top choices of graduates.