Cryptonics Consulting is a worldwide operating spin-off company of S2 Grupo.

The company applies more than 15 years of cybersecurity and secure development to blockchain and distributed ledger technology.

With offices in Valencia, Madrid, Barcelona, Bogota, Mexico F.D, Brussels and Lisbon, the parent company, S2 Grupo, is one of the leading national companies specialized in Cyber-Security and Operation of Mission Critical Systems.


Dr. Stefan Beyer – CEO and Co-Founder

Stefan Beyer graduated from the University of Manchester in 2001 with a degree in Computer Science, and obtained a Ph.D. in 2004 from the same university with the title “Dynamic Configuration of Embedded Operating Systems”.

Since then he has worked in computer science research in distributed systems, fault tolerance, ubiquitous computing, and cybersecurity.

Dr. Stefan Beyer has always been interested in computer networks and distributed system and blockchain technology was a natural evolution for him. He now specializes in Ethereum Smart Contract development and auditing, blockchain consulting and teaching and dissemination of blockchain and related technologies in general.


Miguel A. Juan – Board Member and Co-Founder

Miguel A. Juan holds an MSc degree in Electrical Engineering by the Technical University of Valencia and has Research Qualification in Computer Science. He held a position as Associate Professor at the Technical University of Valencia from 1986 to 1989, in the area of Software Engineering.
He worked at IBM, from 1989 to 1995, as Senior Engineer, Project Manager and Technical Liaison at IBM Labs in Endicott and Poughkeepsie, NY, USA.
After that, he worked for several companies in the ICT industry as a freelance consultant. In 2001, he was one of the founders of S2 Grupo, a company specialized in cybersecurity, and has been Managing Partner until today.
He is co-responsible for the company’s growth up to a revenue of 15 M€, its participation in a number of European R&D Projects and its process of internationalization in Europe and Latin America.
Member of the Board of Directors and the Partnership Board of ECSO (European Cyber Security Organization).
President of the Valencia Regional Chapter of AMETIC (Spanish Association of Electronics, ICT and Digital Content Companies)
Member of IEEE and ACM.


José Miguel Rosell Tejada- Board Member and Co-Founder

Industrial Engineer, specializing in electrical engineering, from the UPV Technical School of Industrial Engineers, specialist in transport and maritime business from the Pontificia de Comillas University (ICADE) and holds a Master’s in Security Management and Monitoring from ASIMELEC and the Pontifical University of Salamanca.

He is currently a Managing Partner of S2 Grupo, a  company with offices in Valencia, Madrid, Bogotá, Mexico, Lisbon and Brussels,  specializing in providing cybersecurity services both in the area of Corporate Information Systems (IT) and in Industrial Control Systems (ICS), operation of mission-critical systems and in the design, implementation and management of monitoring solutions in IT and OT environments, surveillance and operational intelligence.