Managing director (responsible for XML technologies and business development) at le-tex publishing services GmbH, a premedia, systems integration, and XML consultancy company of approx. 190 people.

Expert in XSLT 2.0+, XProc, Schematron, Relax NG and several common XML vocabularies such as DocBook, TEI, and JATS/BITS/STS.

Editor of the XProc 3.0 spec, member of the NISO STS standing committee.

Contributor to the open-source conversion/checking framework transpect.