Diego Díaz coursed his studies at Universidad Francisco Marroquín in his hometown, Guatemala. He obtained a Mayor on International Relations with a Minor in foreign trade and another minor in International Organizations. On his studies he was very interested in regional integration and he participated at the Model of the Organization of American States (MOAS) at Washington, D.C. in 2002.
In the year 2005 he started his professional career at the Guatemalan Chamber of Industry as an assessor in International trade, where he soon was responsible for the industrial sectors market access and rules of origin negotiations for the Guatemalan Free Trade Agreements with Colombia, Chile and CARICOM. At 2008 he participated in the beginning of the negotiation process of the Association Agreement between Central America and the European Union which is currently coming to an end.
At the Guatemalan Chamber of industry he was representative at the Guatemalan Standardization Commission (COGUANOR) as well as to the standardization committee at the National Science and Technology Council (CONCYT).
He has published many articles for the Central American Region´s Industrial Sector, such as: "Historic Accomplishments of the Free Trade Agreements", "The Importance of Management Systems in the DR-CAFTA", "The Impact of the Pre-packing Central American Technical Directive in the Industrial Sector", "The behavior of the industrial exports, after one year of the DR-CAFTA" and " Fair Trade, an alternative for the little producer".
He has participated in the developing and execution of projects with cooperation from the European Union, United States and the government of Japan. Some of the projects are: "Single Sanitary Authorization Center" between the Guatemalan Health Ministry and the Guatemalan Chamber of Industry, the management system certifications for the industries SME´s project; the project has given support to more than 10 firms to get certifications in ISO 9001:2000, Safe Quality Food and HACCP, "Senior Management System Assessor" for the SME´s project; the project has given technical support to SME´s to acquire ISO 9001:2000, Safe Quality Food and HACCP internal assessors, as well as Safe Quality Certifications for the Wall-Mart distributors Project, between others.
He has coursed many courses developed by the Advisory Center for WTO Law (ACWL) for the government of Guatemala in Trade Remedies, Trade in Goods, SPS, Agriculture at the WTO and Dispute Settlement.