Sergio has vast experience as an attorney, with more than 30 years of professional
practice, in which he has consulted as attorney and notary public for corporations,
banks, state institutions amongst others.
He certainly is an important element for our firm in matters of negotiation or client
relations due to his charisma and sociable persona.
He has a Masters degree as Notary Public and Registrations which provides legal
security to our team´s and client´s actions.
Sergio is a Founding Partner in Avante and is of great support on our day-to- day´s
affairs and provides our ranks and clients with the proper sponsorship for their tasks
and objectives with commendable professionalism.
Sergio has a passion for nature, the beach, horses, orchids, hikes and of course his

  • Avante Legal Networking Founding Partner, 2017
  • Masters as Notary Public and Registrations, 2015
  • Notary Public and Attorney for: INVU, Costa Rica National Bank
    (BNCR), CCSS, Banco of Costa Rica (BCR), amongst others, 1992-2017
  • Leiva & Associates Law Firm Founding Partner, 1974-2016
  • Head of Legal Department at Construction Bank, 1981-1984