Arno works for the Science Experiments Foundation.

As a freelancer, he builds websites (examples).

He is project leader of proefjes.nl and het woord van vandaag. Also, he is starting up two new educational projects.

He is co-founder of the interdisciplinary magazine Blind, where he was webmaster, editor, and editor-in-chief.

Hij gave advice about education-related websites, such as UvA Studentensite, Schoolbieb.nl, and Knutsellab.