Since 2007, Stefan has been working as a brand and media specialist in the Brand and Media Experience unit at eye square. After six years of gaining invaluable knowledge within the company, Stefan became the head of his unit in 2013 and is a Partner since 2018. Stefan supports advertisers and marketers with studies on the understanding of media types, advertising formats and creative services. In addition to his intensive involvement with moving image advertising, Stefan is one of the leading experts in the processing and impact of digital creation and social media advertising. Stefan conducted the award-winning media ethnography study Mapping the Impact for Screenforce in 2023 (Horizont Real Impact Award, 2023). He leads global studies on the impact of creator ads in the social marketing mix (Authenticity Sells, Snapchat, 2024) and is responsible for the internationally award-winning study “Power of Creation” (IAB Research Award, 2016). Stefan moderates workshops on digital creation and regularly speaks at conferences.