Write to us
Your contact persons
Carsten KosterManaging Director +49 (40) 24 42 48 - 10
With more than 25 years of experience in media research and media planning, Carsten Koster is an expert in the advertising industry. He was self-employed for a decade in the field of information management for marketing/communication and in IT consulting. Mr Koster is the Key Account Manager and Managing Director at AdVision digital.
Kirsten Schmidt-VoglerKey-Account Sales +49 (40) 24 42 48 - 10
The world of media has been the professional home of the native Rhinelander for more than 30 years, first in the field of media planning and later as Media Director. In renowned agencies such as Springer & Jacoby Media, Mec and others, Kirsten Schmidt’s focus and passion was mainly on the automobile industry. After two years in sales office work of the Hamburg-based publishers Burda, she has now been responsible as Key Account Manager at AdVision digital since the beginning of 2020.
Sammy NguyenData Lead +49 (40) 24 42 48 - 10
Sammy Nguyen is an expert in the field of market intelligence and marketing effectiveness. He began his career as a Data Operations Specialist at Nielsen in the field of Out-of-Home and advertising statistics 15 years ago, later as the Product Manager in Commercial/Business he was responsible for the expansion of the products OOH and advertising statistics. Since the spring of 2019, Nguyen has been enriching AdVision digital with his many years of experience and passion for data as an interface between operations, IT & management.
Sandra NissenManagement Assistant +49 (40) 24 42 48 - 26
Sandra Nissen is a trained merchant for marketing communication and started at AdVision digital in 2016 in the editorial mentions department. A little later, she took over as team leader for the online mentions section. Since 2022, Ms. Nissen is Management Assistant and the first point of contact for customers and takes care of all areas of administration.
Frank RittmannProduction Manager +49 (40) 24 42 48 - 44
Frank Rittmann has been working in the world of media for more than 20 years. After training to become a bookseller and book publisher, he completed extra-occupational studies to become a bachelor of publishing and gathered many years of experience in a trade journal publishing house. There as departmental head, he was responsible for customer service and for dispatch handling. Mr Rittmann has been part of the AdVision team since October 2017 and he manages the department production/acquisition.