Founder of No Binaries España. Decimavilla has extensive experience in defending the rights of LGTBIAQ+ people, particularly regarding the visibility of the non-binary and trans realities. They have worked on projects aimed at promoting inclusiveness, fighting discrimination and generating safe spaces for the collective. Their work includes designing and developing educational materials and training activities that address gender and sexual diversity from intersectional and critical perspectives.
At No Binaries España, Decimavilla has coordinated initiatives focused on education and awareness-raising related to non-binary and trans identities. They have also worked on reviewing legislation and on setting up practical resources to support the members of the collective against social and legal challenges. Decimavilla also trains volunteers who work with minors, particularly in the world of scouts. The focus is on conveying the importance of eradicating adultcentrism and allowing children and adolescents to be part of their own learning process and discovery of their identity and orientation.

Olatz Etxebarria Perez de Nanclares lectures at the Department of Didactics of Language and Literature of the University of the Basque Country, and has a PhD in Psychodidactics: Psychology of Education and Specific Didactics, from the University of the Basque Country with an international stay at Harvard University.
Etxebarria has 17 years of experience in different areas of education in the Basque Country, United States and Asia. Her main lines of research are gender identity, special education needs, and multicultural and multilingual educational environments. She has published in high-impact journals and has been a speaker at international and national conferences. She fiercely defends diversity and real inclusion.
https://orcid.org/0000-0002-2998-4395

Alessandra D. Fisher is a Clinical Research scientist and a Clinical Physician specialist in Endocrinology and Andrology with a special interest in transgender health. She is a co-founder and the current Past President of the Italian Society Gender, Identity and Health (SIGIS). She has been an elected board member of the European Association for Transgender Health (EPATH), as well as a board member of the Italian Society for Andrology and Sexual Medicine (SIAMS). She is a member of the European Society of Sexual Medicine (ESSM) education transgender committee, and young researcher committee of the International Society for Sexual Medicine (ISSM).
She has won the Best of The Journal of Clinical Endocrinology & Metabolism 2016 and the ESSM Research Grant 2016.
She has been involved in several multicentric clinical studies regarding persons with GD/GI. She is a highly experienced clinical trial leader, having a previous experience as coordinator in different multicentric clinical studies involving multidisciplinary teams, mostly having GD/GI and Sexual Medicine as topic. She is part of the Endocrinology Steering Committee within the project European Network for the Investigation of Gender Incongruence (ENIGI). She has authored or coauthored more than 100 scientific international, high impacted journals, papers and book.
https://orcid.org/0000-0003-3446-5132

Psychologist, sexologist and a PhD in Sociology. Assistant Lecturer at the Department of Educational Science at Zaragoza University. Associate lecturer on different master’s degrees and specialisation courses in Sexology.
Over the last 20 years, Gonzalez-Mendiondo has implemented and developed different Sexiology Care and Education Services in Madrid and Aragón, where she worked with different entities and institutions. She headed the Sexology Care Service of Huesca City Council’s Municipal Youth Plan between 2007 and 2020, which she combined with private individual and couple counselling from 2005 to 2022.
She is the author of different publications on gender and sexuality, included her latest book: El género y los sexos. Repensar la lucha feminista, published in 2019 and reissued in 2022.
https://orcid.org/0000-0002-6273-8671

Dr Cal Horton (they/them) is a Research Fellow at Oxford Brookes Centre for Diversity Research Policy and Practice. They are a mixed methods social scientist specialised in Applied Trans Studies. Their research focuses on the rights and well-being of trans children and young people, in healthcare, education and families. Their education focused research considers trans children’s experiences in UK schools and the factors that help trans children to thrive in education. In healthcare they are currently leading a 4 year multi-country research project on Patient Reported Outcomes Measures for trans healthcare, focusing on the identification and prioritisation of healthcare outcomes that matter most to trans children, adolescents and young adults.
https://orcid.org/0000-0003-1944-4122

(better known as Joserra Landa)
He trained in education, psychology and sexology. He heads and teaches at the Institute of Substantive Sexology (Isesus); he also co-manages and provides couple and sexual therapy at the BIKO ARLOAK Couple Care Centre. He directed a Master’s Degree in Substantive Sexology and the Miguel de Cervantes European University in Valladolid, and was a member of the INCISEX teaching staff. He has lectured on multiple post-graduate programmes (Master’s Degree in Family Therapy at the Pontifical University of Salamanca, Master’s Degree in Sexology at the Camilo José Cela University, Master’s Degree in Sexology at Alcalá University…). He is currently lecturing on the Master’s Degree in Relational Systemic Psychotherapy at Deusto University and on the Sexual Education Specialisation Diploma at the UPNA. Joserra Landa has been a speaker, organiser and member of different scientific committees at many symposiums, conferences and congresses. He has published different articles, monographs, chapters and books.
In the last 30 years, he has worked with transsexual people, along with their partners and families. Furthermore, he has collaborated with Naizen (Association of Families with Trans Minors) He has published several works on this theme.
https://es.wikipedia.org/wiki/Jos%C3%A9_Ram%C3%B3n_Landarroitajauregi_Garai

Founding member of Naizen where he provides families with assistance and support; designs and creates educational resources and awareness-raising campaigns; works with public institutions to achieve legislative changes; writing guides and action protocols at schools; and better medical care for transexual people; training and mentoring professionals from different fields and dissemination tasks. Author of the book Tránsitos. Comprender la transexualidad infantil y juvenil a través de los relatos de madres y padres, and other articles on transsexuality and sexual diversity.
He has a PhD in Computers and a Master’s Degree in Sexology. Researcher and lecturer at the University of the Basque Country. He has recently dedicated his research to child and youth transsexuality and published his results in scientific journals.
https://orcid.org/0000-0002-3054-790X

Joz Motmans is the coordinator of the psychosocial care of the Centre for Sexology and Gender at Ghent University Hospital. As a licensed psychologist, social researcher and transgender expert, his expertise includes LGBTIQ+ studies, new social movements, equality, emancipation, health, quality of life, and social attitude research. MA in Clinical Psychology. Post-graduate in Women’s Studies. PhD in Social Sciences [Social movement theory & trans emancipation].
Member of the Working Group on gender inclusive language (Taalunie). Member of the European Society for Sexual Medicine ‘Transgender Sexual Health and Dysfunction Scientific Committee’. Board Member of the World Professional Association for Transgender Health (WPATH). Founding board member & current past-president of the European Professional Association for Transgender Health (EPATH). Senior researcher in regional, national and international research projects on LGBTIQ+ health, quality of life, violence and discrimination, social attitudes. He has several scientific publications.
https://orcid.org/0000-0001-7643-4153

PhD in General Medicine and Surgery from the UPV/EHU and specialising in Paediatrics-Endocrinology, with specialist training in diabetes and the endocrinologist approach to transexual minors. Section Head of Paediatric Endocrinology at Cruces University Hospital (Osakidetza). Chair of the Spanish Paediatric Endocrinology Society (2020-2024). Member of the Gender Identity Unit of the Basque Health Service-Osakidetza. Co-author of the “Guide to Comprehensive Care for Transsexual Persons” of the Basque Government. Member of the SEEN and ESPE Gender Identity task forces.
In the last 8 years, Rica has published scientific articles in 39 international and national journals and in 5 Paediatric Endocrinology treatises; has presented communications and papers at 90 national and 18 international conferences; and has taken part in 14 research projects. She has also taken part in many specific training activities on gender diversity.
https://www.researchgate.net/profile/Itxaso-Rica

Jiska Ristori is a psychologist and psychotherapist, working within the field of gender identity since 2008. In particular, her activity is focused on supporting gender affirming paths in young and adult transgender people, as well as addressing gender related issues. She is part of scientific associations such as SIGIS, EPATH and WPATH and is active in research, with several scientific publications mainly in the field of gender identity health. She regularly participates in national and international congresses with oral communications. She is co-author of the Children Chapter of the WPATH SoC 8 and part of the WPATH Global Education Institute.
https://orcid.org/0000-0001-8684-9643

Bea Sever is a sexologist, expert in Suicidology, journalist and mother. She has specialised in transsexuality in minors, runs training courses, gives talks, and attends congresses, seminars and symposiums as a speaker on the theme. She is head of care and support at Naizen. Lever also offers guidance and mentoring to professionals of education, medicine, psychology, social services, the media, local councils, etc.