Andrea Gatto completed a five-month traineeship with the Directorate-General for Employment, Social Affairs and Inclusion of the European Commission from October 2014 to February 2015. During this time, he assisted with analyses of national reports on the implementation of EU occupational safety and health directives. He also contributed to draft replies to citizen complaints about health and safety at work. Additionally, Gatto established a compendium of relevant European Court of Justice case law and performed a comparative analysis of a draft Serbian health and safety law. His supervisor praised Gatto's timely completion of tasks, willingness to take on new responsibilities, and fluency in multiple languages.