Prior to Ithaka, he was Deputy General Manager at Banco Santander, where he served as Global Head of Credit, overseeing Bonds, Syndicated Loans, Project Finance, and other types of Structured Finance.

He was also globally responsible for restructuring across multiple countries, having led the restructuring of over 60 business groups in Spain, Portugal, Brazil, and Mexico, among others. Before his time at Banco Santander, Mariano was a Manager at Arthur Andersen, first in Audit and then in Financial Advisory. Currently, he is a member of the board and Vice Chairman of Metrovacesa, the largest housing developer in Spain, and a member of the board of Informa and Atlante. Additionally, he serves on the Risk Committee of CRISAE, a debt fund managed by Banco Sabadell. Mariano holds a degree in Business from Universidad Complutense de Madrid, with a focus on Finance, Audit, and Consolidation, and he also completed a PDG at IESE.