Christoph Lange has been leading a sub-group in the Enterprise Information Systems group at the University of Bonn, Germany, and the “Organized Knowledge” department at the Fraunhofer Institute for Intelligent Analysis and Information Systems (IAIS) since 2013. He holds a Ph.D. from Jacobs University Bremen, Germany, for enabling collaboration on semiformal mathematical knowledge by semantic web integration. His research is broadly concerned with representing expressive knowledge in complex domains in a formal but scalable way using linked open data, which enables machine support with quality assessment, retrieval, publishing, collaborative authoring, etc. Application domains range from scholarly communication to enterprise information integration. Christoph has organised numerous conferences, challenges and workshops on semantic web and intelligent computer mathematics topics.