Graduating from the Faculty of Electrical Engineering and Computer Science, University of Ljubljana, in 1986, she got her Master's degree in Information Management from the Faculty of Economics, University of Ljubljana, in 1998. She is currently finishing her doctoral program in Computer and Information Science at the Faculty of Electrical Engineering and Computer Science, University of Maribor.

Tatjana HAJTNIK has been working over twenty-seven years in the field of informatics. She acquired her professional experiences in both, economic companies, public sector as well as in public administration. She started her professional career as a systems engineer on large computer systems and continued it in the Health Insurance Institute of Slovenia as a Chief Information Officer. In the years from 1999 to 2006, she was intensively occupied with the questions of information security in the State Administration and was the holder of the implementation of modern standards in the field of information security in the Governmental Centre for Informatics and in the wider public service. 

In 2006 she became a Head of the Department for Electronic Archives and Computer Support in the Archives of the Republic of Slovenia, where she is actively involved, in addition to the maintenance and development of the information system of the Archives of the Republic of Slovenia, with the field of electronic storage of documents and archives. 

She participated in the compilation of the development strategy of the Slovenian digital archive (e-ARH.si) and its action plan which was confirmed by the Government of the Republic of Slovenia. As a member of the project board she supervises how the strategy is being realized and is the head of the expert group directing the project. She set up the methodology for certification of equipment and services needed for digital storage of records as determined by the Archival Act, and is in charge of the certification procedures. She also participates in the process of confirmation of internal rules for capture and storage of digital records. Since 2007 she has been involved in the process of amending national legislation for the field of digital preservation. 

She is a member of the Working Group for Slovenian Archival Terminology. In 2013, she became a lecturer for the field of Archival and Records Management Studies at the University Alma Mater Europaea – European Centre Maribor. She regularly holds lectures and publishes articles on the subject of digital preservation.