Jaan Priisalu is the former General Director of the Estonian Information System’s Authority. He is the co-founder and Head of Tallinn's Department of the Estonian Defence League’s Cyber Unit - an organisation that defends the Estonian cyber space and unites voluntary IT-specialists - and member of the Estonian Information Systems Audit Association, Priisalu has almost two decades of practical experience on the matter of preventing and defending cyber-attacks.

Before entering the public sector, Priisalu worked at Guardtime, Ühispank, Cybernetica and served as the head of SIRT (Security Incidents Response Team) at Swedbank; having worked through the 2007 cyber-attacks. Named as one of the leading cyber security experts in the world, Jaan Priisalu earned his academic education from the Tallinn University of Technology and Toulouse III (Université Paul Sabatier) in France.