Chief Executive Secretary (CES) of the Brazilian Internet Steering Committee
- 1968/1972 – Researcher at Van de Graaff Laboratory at Institute of Physics/USP (University of São Paulo)
- 1972/1990 – Researcher at Microelectronics Laboratory – Escola Politécnica – USP
- 1989/1993 – Special Adviser to the Director (Dean) – Escola Politécnica – USP
- 1994/1996 – Special Adviser to the Rector of University São Paulo
- 1996/2004 – Special Adviser to the President of FAPESP (Foundation for Reseach Support of the State of São Paulo)
- 1996/2002 – Coordinator of the Academic Network/ANSP at the State of São Paulo
- 1996/2009 – CEO of the Brazilian Internet Steering Committee – CGI.br/NIC.br