Marisol Casado has been President of the International Triathlon Union since 2008, when she was elected at the ITU Congress in her hometown of Madrid, Spain. She has extensive experience and expertise in the Olympic sport of triathlon, being one of the founding members of the Spanish Triathlon Federation and also heavily involved in the creation of ITU in Avignon in 1989. She served as Secretary General of the Spanish Triathlon Federation (1989–1994 and 1997–2008) and as ITU Treasurer from 1992–1994 and from 2000–2008. Marisol was involved with the foundation of Mediterranean Triathlon Federation and Iberoamerican Triathlon Associatio. SHe currently also serves as a Vice President of the Spanish Triathlon Federation.

Casado was elected as a Member of the International Olympic Committee in February 2010 at the 122nd IOC Session ahead of the Olympic Winter Games in Vancouver, the first representative from triathlon to serve on the IOC. Shortly after, she was appointed to the Coordination Commission for the 2nd Youth Olympic Summer Games in Nanjing 2014. She was elected a Council Member of the ASOIF, the international association of summer Olympic federations, in 2011. Representing ASOIF, she was nominated Co-Chair of the International Sport Coaching Framework Project Group in 2011 and since 2013 she is an SportAccord Council Member. Since 2014 she joined the IOC Women and Sport Commission and IOC Radio and TV Commission. She has been included into the Good Governance and Autonomy Olympic Agenda 2020 Working Group.

Casado served as President of the Women and Sport Commission in the Spanish Olympic Committee from 1992–1994 and from 2000-2009. A former President of the European Triathlon Union, made up of 41 federations, from 2002 to 2008, she received the gold medal award, “Real Orden del Merito Deportivo Español,” for her service to sport and the Olympic Order of the Spanish National Olympic Committee.

Born in Madrid in 1956, Casado launched her competitive sport career in running and field hockey as a student. She participated in the first triathlon in Spain and won the race. Casado has a degree in Hispanic Language and an MBA in Sport. She resides in Madrid with her husband and daughter.