Mr. Arrieta is a founding partner of Arrieta Mantilla & Asociados, a Colombian boutique law firm. He has issued expert recommendations regarding mining/oil and gas law, corporate law, administrative law, infrastructure and public services law, and public contracts and procurement. Moreover, Mr. Arrieta has litigated in the above mentioned areas, and served as an arbitrator in fiduciary, administrative, infraestructure and public disputes.
Colombian Oil & Gas Bar Association. Ex Judges of High Courts Association. Arbitrator of the Chamber of Commerce of Bogotá. Directive Council, Permanent Court Arbitration.
Partner Arrieta Mantilla & Asociados (1998 to date). Agent for the Colombian government before the International Court of Justice (2013). Colombian Ambassador to The Netherlands (1994-1996). Colombian Attorney General (1990-1994). Justice, Council of State of Colombia (1990). Co-Justice, Constitutional Court of Colombia (1984). Faculty Dean, Law School, Universidad de Los Andes (1986-1989). Economic Law Professor; Mining and Oil and Gas Law Professor, Universidad de Los Andes (1978-1990).
"Towards a Colombian Gold Industry", Universidad de los Andes (1974). "El Principio de Derecho Administrativo", Universidad de los Andes (1988).
Universidad de los Andes, Law degree (1974). Harvard Law School, Harvard University, LLM,(1975). Languages: Spanish, English, and French.