Mellbye has held a number of tech and development-related positions in the Schibsted Media Group. In recent years she founded and led Aftenposten Mobil AS. For four years, she focused solely on the platform that transforms the most, the mobile, in the industry that, until now, has been hit hardest by disruption, the media industry. She initiated the Aftenposten conference series "Technology & the Future of Work», hosting keynotes such as Apple-co-founder Steve Wosniack and researcher Ray Kurzweil. She actively participates in the debate on how Norway and Norwegian business needs to transform and adapt to new realities. Mellbye was also part of a global change team whose mandate was to facilitate the transformation of Schibsted from a traditional hierarchical, decentralized media group present in 31 countries, to a global matrix organization with product and tech - and data - on the horizontal access. This transformation was not least a response to competition from global tech companies such as Facebook and Google. Mellbye is founder, strategy advisor and board member in companies such as XXL, Polaris Media and Ullevaal Stadion Group.