In 1982–1997, Hajizadeh worked in various managerial positions in the professions of financier, accountant and economist in the Fuel and energy Complex of Azerbaijan (SOCAR [7], Oil and gas extraction company H.Z.Taghiev, Production association of oil and gas on land, Joint-Stock Company “Azerigaz”).

In 1997–2014, he worked at different positions in the field of science and education: - Union of Economists of Azerbaijan [8] - expert; - Azerbaijan National Academy of Sciences (ANAS) Institute of Economics:[9] Sector of “Structural changes” - head, Department of “Macroeconomic Development and Economic Growth” - chief scientific officer; - Azerbaijan State University of Economics - UNEC:[10] “Socio-Economic Research Laboratory” - head, “Center for research and consulting on the development of regions of Azerbaijan” - director, “Masters Training Center” - deputy director.

He is the author of conceptual research on the problems of modernization of the national fuel and energy complex.

The concept of “socialized economics” - (socialized economics - new economic concept), world economy, industrial policy and infrastructure problems, national regional strategy of development (autonomous activity, Free Economic Zones, industrial parks, regional clusters, business incubators), energy security and national energy strategy, challenges of modernization of the fuel and energy complex, model of oligopoly in development of the Azerbaijan oil industry, alternativeness in transformation of hydrocarbonic resources into nuclear potential, high technologies, information economy, nanotechnologies, the problem of urban public transport, new environmental requirements of motorization, the improvement of the regional transport infrastructure: corridors East-West and North-South, TRACECA, railway line Baku-Tbilisi-Kars, the Caspian-Persian corridor - geo-economics foreshortening (economic purposes and efficiency of constructing of the water canal from the Caspian sea to the Persian gulf), condominium safety and new financial architecture in power engineering in the Near East, Evaluation of economic potential in the South Caucasus and Caspian Basin regions.

The biobibliographic publication is dedicated to the life, scientific, pedagogical, labor and social activities of the Doctor of Economic Sciences, Professor Elshan Mahmud oglu Hajizade.

The publication includes in Azerbaijani, Russian and English the important dates of the events of the author's life, the main directions of his scientific activity, certificates, diplomas, certificates and other certificates obtained in connection with the academic degree, academic title and education, a bibliography of scientific works, a list of journalistic articles and research works performed in the field of science and education, prepared projects, reviews of books in the press, participation in dissertation councils and round tables, dissertations in which he is an official opponent, information is also provided information is about the scientific editorial boards of which he is a member and head.