Klaas Bals studied Computer Science at the University of Antwerp, Belgium. He is a member of the XSL working group. He is working for Inventive Designers, where he's active in research and development.

At Inventive Designers, he is responsible for new technologies, including Inventive Designers' product called 'Scriptura', a document design and generation solution for XSL-FO, including the WYSIWYG designer.