He was the son of Adriaan Loosjes, a prolific writer who started a publishing company in Haarlem.
In 1833 he was chairman of the regents of the Mennonite orphanage in Haarlem that was celebrating its bicentennial.
He commissioned a painting by Jan Adam Kruseman which featured the regents as well as a few orphans.
He also was a member of the Haarlem societies Oefening in Wetenschappen, the chamber of rhetoric Wijngaardranken, and Demokriet.
His publishing company was continued by his son Adriaan Loosjes III.