Pieter Alidanus Bruijn was a chief engineer shipbuilder for the Royal Dutch Navy (Koninklijke Marine).
Bruijn entered the service of the Royal Dutch Navy in Den Helder at early age.
In 1857 he was appointed naval Cadet 3rd class and in 1861 sailed for the first time to the Dutch East Indies.
As a trader in naturalia Anton Bruijn delivered items to Hermann Schlegel (Leiden), Tommaso Salvadori (Turin), and the Muséum national d'Histoire naturelle in Paris.
Bruijn sent in 1877 an expedition to New-Guinea (Vogelkop, the land of the Karons) to do ethnographic studies and to collect specimens of Zaglossus bruijnii.