Antonio A. González del Castillo, PhD, MSL-BC, is an experienced Medical Science Liaison (MSL) with a diverse and solid scientific background. With experience working with six different molecules across various pathologies, Antonio is proactive and innovative in his work, always seeking to improve the MSL's day-to-day operations while contributing to the further development of MSL competencies. Antonio has an extensive educational background, including a PhD in Internal Medicine from Universidad Complutense de Madrid and a Master's degree in Clinical Trials Management from the European School of Pharmastudies. Antonio has also been involved in several organizations including his current work as a Medical Science Liaison for Rare Diseases at Sanofi Genzyme and his former work as a Coordinator for the MSL Working Group at the Asociación de Medicina de la Industria Farmaceutica de España (AMIFE). Additionally, Antonio has served as a Mendeley Advisor and worked for companies such as AstraZeneca and Bristol-Myers Squibb in MSL roles. Antonio is a driven and passionate MSL who is committed to growing as a professional in the pharma industry and making meaningful contributions to healthcare.