During this period, he also worked as a research assistant for the chair of criminal law at the University of Erlangen-Nuremberg.

In 1850, after declining a call as professor to Würzburg, he accepted the chair of German law at Innsbruck.

Appointed in 1852 to the chair of commercial law at King's College London, he was a popular instructor who innovated evening classes.

In 1969, he accepted a chair of public law at the German University of Administrative Sciences and served as university president from 1971 to 1972.

Odoardo Farnese, duke of Parma, engaged him however on very liberal terms, to occupy the chair of law in his university.

Austin was the first chair of law at the new University of London from 1829.

Harvard took the opportunity to fund its first chair of law.

For example, in 1851 he established a chair of law of law there with François-Maximilien Bibaud at its head.

He currently holds the chair of general international law at the University of Göttingen.