Catriona MacCallum is Director of Open Science at Hindawi Limited. She has 21 years experience in scholarly publishing. She joined PLOS in 2003 to launch PLOS Biology as one of the Senior Editors, leaving as Advocacy Director in 2017. She is a member of the OASPA Board of Directors, the Advisory Board of the Royal Society and DRYAD. She is on the steering committee of DORA. She is a founding individual of the Initiative for Open Citations campaign. She was a member of the European Commission’s Open Science Policy Platform.