Julio Senn began his career at Arthur Andersen in 1990, joining the Prisa Group's AS newspaper in 1998 as Assistant General Manager, Finance and HR. He joined Real Madrid Club de Fútbol in 1999, working as General Manager, executing the project of reorganization and integral modernization of the club. He joined Garrigues in 2002 as the Partner in charge of the Sports & Entertainment area, where he has provided comprehensive advice to entities in the world of sports and entertainment, as well as providing comprehensive advice to athletes, artists, and professionals in these sectors. In 2011, together with Javier Ferrero, they founded SENN FERRERO ASOCIADOS SPORTS & ENTERTAINMENT SLP, which is the largest boutique in Europe specialized in the world of sports and entertainment, where they have continued to lead the industry in professional advisory work.

He is an advisory member of the Center of Sports Business Management (CSBM), holds the title of auditor of the Official Register of Account Auditors (ROAC) and is a member of the Madrid College of Economists.

Due to his experience and international professional career, he is a regular speaker in different master’s degrees and training courses related to the management of the professional sports world at national and international level.