José María Castro Rubio is an IE University professor teaching Financial Mathematics at first year degree in BBA since 2010-2011 course. He is currently a consultant and financial advisor for ARCA S.L. consultancy (Madrid), and manager and administrator for NAIL4US, leader in gel nails sector, (Madrid). He is also an active partner for MAT S.L. teaching financial mathematics and business statistic with two main approaches: opposition to the state officials preparation and support classes for UAM and URJC students. Previously José María worked in BBVA and SANTA LUCIA insurance company both in Madrid.