Mr. Casal has founded and co-founded several successful startups with a total aggregated exit value of more than 1 Billion dollars. After working as Chief Security Officer of some of the first ISP in Spain: Medusa/ICL and Servicom/Retevision, he founded IP6 Seguridad in 1997, the first specialized cybersecurity company in Spain. In 2001 he was co-founder of IP Soluciones a security and software development company that was sold to Oesia 5 years later with more than 300 employees. 

In Mr. Casal co-founded AlienVault in 2007, relocated the headquartes in 2010 and was CEO until January 2012. AlienVault raised $110M from 12 Silicon Valley venture capitals including Kleiner Perkins, Intel Capital and Trident Capital and was sold in 2018 to AT&T as the core cloud security platform for enterprises. 

Mr. Casal co-founded in 2014 Constella were he serves as CTO, 4iQ is a pioneer Cyber Intelligence vendor working with top financial institutions and intelligence government units in the western world. 

He is an advisor and Limited Partner of several Venture Capital firms such as Forgepoint, Adara and Ballistic. He is a regular seed investor in Spanish and Hispanic entrepreneurs who want to become international and sell in the US.