Johannes (Jan) Josephus Marinus Velterop (born 18 March 1949) is a science publisher.

After a few years out of the scientific field as the director of the Dutch regional newspaper De Twentsche Courant, he returned to international science publishing at Academic Press in London.

He next joined Nature as director for a short while, but moved quickly on to help get BioMed Central, the first commercial open access science publisher, off the ground.

At the end of March 2008 he left Springer [5] to help further develop semantic approaches to accelerate scientific discovery.

[1][7] Velterop also serves on the Advisory Boards of several initiatives and companies, such as Knowledge Unlatched and ScienceOpen.