Estibaliz Sastre Gonzalez is a Graduate in Chemistry and has been working in environmental laboratories for more than 20 years. Her background is related to the application of Quality Standards. In 2010 assumed the technical coordination in ielab for the organization of Proficiency Testing Schemes and was in charge of the statistical studies of results. Since 2019 Estibaliz is the production manager of ielab and responsible of all the activities and services provided by the company.