Đelić served 3 times as Minister of Finance and 2 times as Minister of Science and Technology. He also serves as Deputy Prime Minister, and Minister for European Union affairs. During all his mandates, Mathematical Grammar School enjoyed financial and technical support of Ministries he led. During his visit to MGB Physics Lab 1, Mr. Đelić said he sees MGB students and alumni as "the best ambassadors of Serbia and of Serbian and world science". He said he appreciates top achievements in education, since he himself won French national competitions for high-school students in history and economics in 1980 and 1981, and was educated at the Institut d'études politiques de Paris and later École des Hautes Études Commerciales in Paris where he graduated as a top student. In 1987 he received a double master's degree in economics at the Ecole des Hautes Etudes en Sciences Sociales. He eventually moved to the United States, where he completed a Master of Business Administration at the Harvard Business School, as well as a Master of Public Administration, specializing in macroeconomics and international relations, at Harvard's Kennedy School of Government. His mentors were Alain Gomez, the chairman of Thomson SA, who taught him how to be a manager, and the economist Jeffrey Sachs, who took him along from Harvard to Warsaw and Moscow. Mr. Đelić promised Ministry of Science and Technology will continue to invest in MGB and expressed his personal wish that alumni of Mathematical Grammar School start returning to Belgrade and Serbia at least at the rate MGB graduates leave the country.