In 1946, while employed by the Dutch Organon company in Oss, Van Dorp and Jozef Ferdinand Arens ('Coco') published the synthesis for vitamin A acid in the scientific journal Nature.
Ethisterone was also marketed in the U.S. from the 1950s into the 1960s under a variety of trade names by other pharmaceutical companies that had been members of the pre-World War II European hormone cartel (Ciba, Organon, Roussel).
He also served on the Boards of various multinational and national companies in Pakistan as either a Director or Chairman including: United Bank Ltd, Eastern Federal Insurance, Brooke Bond, Pakistan Oxygen (now BOC Pakistan), Aspro-Nicholas (now Reckitt Benckiser), Organon Pakistan (part of AkzoNobel) and Pakistan Cables (BICC).
In the holocephalan species Chimaera monstrosa (ratfish), he described, in the basal midline of the diencephalon, a previously unknown ependymal structure adjacent to the rostral part of the optic chiasma referred to as the ‘organon vasculare praeopticum’.
The specialization restricting the meaning of "science" to natural science follows the rise of Baconian science, which contrasted "natural science" to scholasticism, the Aristotelean method of inquiring from first principles.