Ljiljana Mihajlović completed primary school and grammar school in Šabac. In 2004, she enrolled in the Environmental Geosciences study programme, graduating in 2009 with a thesis entitled Environmental Conditions in the Dobrava River Basin. She defended her master's thesis, Geoecological Determinants of Population Migration in Serbia, in 2010. In 2024, she defended her doctoral dissertation entitled Ecological and Rural Transformation of Mountain Areas of Western Serbia in the Context of Sustainable Development, under the supervision of Prof. Dr. Miroljub Milinčić. Since 2009, she has been engaged in teaching at the Faculty of Geography. In 2022, she was appointed Teaching Assistant, and since June 2026 she has held the position of Assistant Professor. For many years, she served as editor of the student journal Ekogea and participated in the organization and implementation of numerous environmental camps in Serbia and Montenegro. During her undergraduate studies, she participated in a volunteer programme in Yellowstone National Park (USA, Montana, National Forestry Service). During her master's studies, she volunteered with the Municipality of Šabac on a project aimed at developing an Integrated Pollutant Cadastre. She has been a member of the Serbian Geographical Society since 2009 and of the Russian Geographical Society Center in Serbia since 2015. She is the author of numerous scientific and professional papers in the field of geosciences.