Like his second cousin and mentor Johannes Enschedé III, he was a member of the Dutch Society of Science and the Teylers Second Society.
He worked for Enschedé III as editor of the Opregte Haarlemsche Courant from 1829, later joined by Johannes Enschedé IV.
As city publisher, they had the right, but Haarlem withdrew this privilege, claiming ownership.
Jan Justus wrote a book explaining the case of Enschedé, which they won.
[2] In the 1860s the paper was considered the best in the country and attracted editors such as Conrad Busken Huet and Multatuli.