From 2004 to 2014 he was a Professor at Webster University Vienna where he founded the Institute for Mergers, Acquisitions and Alliances (IMAA) and began a professional partnership with Michael E. Porter.
Kummer war von 2004 bis 2014 Professor an der Webster University Vienna, an der er sowohl das Institute for Mergers, Acquisitions and Alliances (IMAA) begründete und die Kooperation mit Michael E. Porter initiierte.