Liisa Past (born 1 May 1980) is an Estonian civil servant, political, communication and cyber security expert.

[1] Liisa Past graduated from Miina Härma Gymnasium in 1999.

She received her master's degree in communication at the University of Tartu in 2012.

[2][3][4] Liisa Past has worked as a journalist and communication strategist, as a leading analyst of State Information Systems, in the leadership of the Cooperative Cyber Defence Centre of Excellence, at the McCain Institute in the U.S. state of Arizona, in the State Chancellery's Security and National Defense Coordination Office.

From the spring of 2021, She worked as the head of the information security department of the Information Technology and Development Center of the Estonian Ministry of the Interior (SMIT), from August 2022 as the head of the national cyber security department of the Ministry of Economic Affairs and Communications.