Paediatrician at the Paris Urgent Medical Aid Service (Service d’aide médicale urgente – SAMU in French) since June 2020. Olivier Guillard also holds a Master’s in political science, development and humanitarian aid. During his professional practice, he worked in teaching positions in paediatric cardiology and cardiac resuscitation units (hôpital Necker – Enfants malades and hôpital Marie Lannelongue), at Doctors Without Borders, and as project manager at the Samusocial de Paris. He develops technical assistance projects at the Paris SAMU in partnership with the department of international relations at AP-HP (Paris public hospitals authority), the City of Paris and the Samusocial de Paris. In addition, he supports the inclusion of social sciences in research on prehospital emergency care.