Team

Dr. Solon Jose Spiegel
CEO
Dr. Spiegel holds a PhD from the Technion-Isarel, an EMBA from EPFL-Switzerland, and an MSc from IME–Brazil. He leads RIO SYSTEMS LTD worldwide and co-founded RIO SYSTEMS ENGENHARIA do BRASIL LTDA. His background spans technology development, strategic partnerships, and R&D program management. He has published extensively, holds several patents, and has served as Chair of the IEEE Solid-State Society, consultant to the Office of the Chief Scientist, and lecturer at leading universities.

Augusto Knüpfer
EXECUTIVE AND GOVERNANCE
Augusto Knüpfer is an executive and governance leader with experience across the energy, logistics, aviation, and technology sectors. He is CEO of Rio System Brasil, Associate at BR Angels, and Counselor at ISAI (pro bono). As an entrepreneur, he co‑founded Fantástico Restaurante, where he led the opening of 6 stores in 4 years, building a group with annual revenue around R$ 20 million.
His earlier career includes senior management roles at Petrobras, Petrobras Logística S/A, Comperj Participações S/A, VARIG Logística S/A, and VARIG S/A. He holds a Master’s in Business Administration from IBMEC, with specializations from INSEAD and Coppead, has taught MBA programs at IBMEC, UFRJ, and FGV, and is the author of Branding, Marketing and Sustainability, published by Editora FGV.

Roberto Castelo Branco
DIRECTOR FOR INSTITUTIONAL RELATIONS
Roberto Castelo Branco is a Retired Colonel of the Brazilian Army and holds a MSc and a BSc in electrical engineering from the Military Institute of Engineering (IME) and completed the Course in Advanced Military Studies at the Brazilian Army Command and General Staff College (ECEME). During his professional career, his roles included Research and Development Advisor at the Army Department of Science and Technology (DCT), Deputy Head of the Army Technological Center CTEx), and Program Manager for the Brazilian Army Radar Program. He was also the founder and CEO of TECDEF do Brasil and worked as a defense project consultant. Over the course of his service, he was decorated with the Order of Military Merit Medal, the Peacemaker Medal, the Silver Military Medal, and the Order of Military Engineers Medal.”
