Between 1965 and 1971 he was employed in the Eindhoven office of urban designer Sam van Embden [nl].
Hendriks was the chief urban design engineer of the municipality of Tilburg between 1971 and 1993.
[1] Between 1973 and 5 June 1974 Hendriks was member of the States of North Brabant for the Catholic People's Party.
[1] In the 1994 parliamentary elections he gained a seat in the House of Representatives for the General Elderly Alliance.
[1][3] In 1997 Hendriks asked the Dutch government questions on the Bilderberg conferences, being the first MP ever to do so.