Vedrana Čižmek has been employed at INA d.d. as Laboratory Engineer since 2006. She holds a M.Sc. from Faculty of Science, Department of Chemistry, University of Zagreb. By working in the Central Testing Laboratory, Vedrana gained experience in the development of methods and quality control of physical-chemical analyzes of various types of water, soil and organic samples from the field of environmental protection. For the last 10 years, she has been focused on microbiological analyzes of water, and especially fuel microbiology.