[4] After graduation Greefhorst started his career at the Software Engineering Research Centre in Utrecht in 1995.
He worked in various roles from software researcher, designer, architect, developer, tester and webmaster to class instructor, coach, seminar organiser, and IT consultant, and published his first papers.
[4] Since 2010 Greefhorst chairs the governing board of Via Nova Architectura, and since 2014 also chairs the governing board of the Special Interest Group on architecture of the Dutch Computer Society Ngi-NGN.
"[7] Furthermore, they argue, that this work "provide[s] both a theoretical and a practical perspective on architecture principles.
"[7] Danny Greefhorst has authored and co-authored numerous publications in the fields of enterprise architecture, software engineering and IT.