Since February 2020, Marija Ileš has been employed as an assistant at the Department of Finance and Accounting at the Faculty of Economics and Business in Osijek. She participates in conducting seminar classes and exercises from several teaching courses at different levels of study within her alma mater. She completed the pedagogic-psychological and didactic-methodical training program at the Faculty of Education in Osijek in 2022. Her special field of research and scientific activity is public finance, fiscal policy and demography. She creates and participates in writing business plans, investment studies, feasibility studies with cost-benefit analysis, and various financial analyses. She gained additional knowledge in the field of advanced analysis of financial statements, models and techniques of company evaluation, evaluation of investment projects and cost benefit analysis, and advanced Excel in finance by attending the Mini MBA in Finance at the Croatian Institute of Public Finance. She is a member of the organizing committee of the international scientific conference Interdisciplinary Management Research, the executive committee of the Association of Accountants and Financial Workers Osijek, and the European Association for Population Studies.