H.E. Santiago Oñate is currently Permanent Observer of Mexico to the Council of Europe. A Mexican diplomat, jurist and politician deeply involved in the OPCW and in the development of the CWC as Permanent Representative of Mexico from 2001 to 2003, as Legal Adviser from 2004 to 2012, and as Special Adviser to the Director-General in the preparation of the Third Review Conference.
His works include the 2nd edition of OPCW: The Legal Texts (2009); The Chemical Weapons Convention: An Overview (2009) and La Convención de Armas Químicas (2010) He has published articles related to the CWC in The CBW Conventions Bulletin, in Chemical Disarmament and in the Journal Judiciaire de La Haye.
He has also served his country as Permanent Representative to the OAS (1991-1992); Ambassador to the United Kingdom (1997-2001); Ambassador to The Netherlands (2001-2003) and as Agent before the International Court of Justice in the case Avena et autres ressortissants Mexicaines (Mexique c. Etats- Unis d’Amérique)