[4][5] In 1991-1993 E. Sandoyan was appointed the Deputy Chief of the Tax Inspectorate of the Republic of Armenia – Deputy Minister, Head of the Main Department of Regulation, Supervision and Licensing at the Central Bank of Armenia, and the Minister of Finance and Economy.

[4][5] He has been the President of CJSC "Armaudit Service" and Deputy Chairman of the Board of Commercial Bank "Albank" from 1993 to 1994.

[4][5] In 1994 he was appointed to the position of the Head of the Main Department for Supervision, Regulation and Licensing of the Central Bank of the Republic of Armenia.

[4][5] Since 2012 he was the Director, Chairman of the Academic Council of the Institute of Economics and Business of the Russian-Armenian University.

[2] From 2009 to 2014 was a member of the Specialized Council 014 of the Higher Attestation Commission of the Republic of Armenia at the Armenian State University of Economics.

[3] Edward Sandoyan is a member of the editorial board of the journal "Bulletin of the Russian-Armenian) University (series: humanities and social sciences)", included in the RSCI,[8][9] and "Collection of scientific articles based on materials of annual scientific conferences (series: humanities and social sciences) RAU".

[20][3] In September 2022, the Ministry of Science and Higher Education of the Russian Federation awarded him with Gratitude for his significant contribution to the development of education, conscientious work, and also in connection with the celebration of the 25th anniversary of the founding of the Russian-Armenian University[3]․ E. Sandoyan was the winner of the Prize of the Eurasian Economic Club of Scientists (Astana) for the best report of the forum on the topic: "The economic security of Eurasia in the system of global risks" in the nomination "The global financial crisis: causes and ways to minimize the consequences։ Anti-crisis recommendations for G-20 countries” (2009).

[3] Author of more than 283 published scientific papers, monographs, textbooks and manuals for about 348 printed sheets, as well as more than 60 newspaper articles.