Eskil Grendahl Sivertsen is a special advisor for the C-SPI project (Cyber-Social Propaganda & Influence), which he co-founded in 2019. He specialises in cognitive warfare and influence operations within hybrid threats.

Eskil holds a Bachelor's in Corporate Communications from Queen Margaret University and a Master's in Strategic Communications from Ithaca College and Cornell University, complemented by military training in InfoOps and PSYOPS. Since 2004, he has worked in strategic communications in both civilian and military roles, including positions as a press officer, communications advisor for defense and foreign ministers, and as a PSYOPS officer in international operations. He also contributes to crisis management and serves as an instructor in InfoOps and PSYOPS at the Norwegian Defence University College, while frequently speaking and commenting in the media.