Marianna Gioldasi is a Chemist, working as Lab & Teaching Staff at Sanitary Engineering Laboratory, at the School of Civil Engineering of the National Technical University of Athens. Her area of expertise is the management of liquid and solid waste and sludge as well as surface water, with emphasis on issues of analysis of physicochemical parameters. She carries out auxiliary teaching work in undergraduate and postgraduate courses, as well as assists in diploma theses. She also has many years of experience in water and wastewater analysis in quality issues (ISO17025).