Pétursson was first CTO and then CEO of Icelandic MMO studio CCP Games. He became CEO in 2004, leading the company's success and growth. He strongly advocates for virtual worlds and the power of games to create meaningful social experiences. Under his management, CCP's science fiction game EVE Online has pioneered concepts like player-driven digital economies, democratically elected community governments, and free-to-play mechanics, celebrating 20 consecutive years of growth. Pétursson's commitment to innovative and immersive gaming experiences has driven CCP's development of cutting-edge technologies, including spearheading blockchain, AI and VR initiatives. A featured speaker at numerous conferences and events, Pétursson is also active on several boards and committees related to Icelandic information technology and innovation.