Ona Costas has been serving as Tècnica a ocupació and Tècnica al Servei d'Ocupació Municipal at Ajuntament de Sant Cugat del Vallès since June 2019. Simultaneously, since May 2011, Ona has been involved with ICONO Serveis Culturals, where roles include Educadora en Museu de Sant Cugat and Coordinadora a Museus de Sant Cugat. Educational background includes a Llicenciatura en Humanitats with a specialization in History from Universitat Pompeu Fabra (2007-2011) and ongoing studies for a Máster in Estudios de género at Universidad Nacional de Educación a Distancia - U.N.E.D. since October 2022.