Marie Sirrenberg Author

Since 2005 Ralf T. Kreutzer has been a Professor of Marketing at Berlin School of Economics and Law. In addition, he is a marketing and management consultant, trainer and coach. He looks back at a career in various management positions at Bertelsmann, Volkswagen and Deutsche Post for more than 15 years.

Professor Kreutzer is well known for considerable impulses on various topics related to marketing, dialogue marketing, CRM and loyalty programs, database marketing, online marketing, digital Darwinism, and strategic and international marketing. He advised many enterprises nationally and abroad and trained and coached managers at middle and top management level. Professor Kreutzer is a frequent keynote speaker at national and international conferences.

Marie Sirrenberg is an IT consultant on marketing and sales at Atlassian Platinum Solution Partner STAGIL. Using Atlassian products such as Jira and Confluence, she actively supports enterprize organizations and mid-sized companies in digitizing processes and developing agile teams. Marie Sirrenberg previously worked as an NPS specialist for Berlin SaaS start-up zenloop, where she supported NLP processes, established sales structures and advised successful e-commerce companies on feedback management. At WDM, a German medium-sized industrial company, she accompanied digitization processes with a focus on online communication and SEO.