The mineral mining industry traditionally considers safety in terms of production and ecology. Modern economy is the economy of risks. Economical development in such conditions is associated with high politico-economic, technological, financial and environmental uncertainty. Moreover, there exist the external (anti-competitive practices) and internal (closure of production, loss of jobs, social tension) hazards. Economic security of large businesses, including the mineral mining sector, is often directly connected with the national security. Based on the integrated economic security of a country and an industry, the author discloses the background and avenues of transformation of approaches to economic security on a macro and micro scale. The top-priority ways to reach advancement in the mineral mining sector in Belarus are modernization of technology and management, including digital transformation of mining plants and their businessmodels, reduction in consumption of materials, decrease in reliance on import, toughening of the environmental standards and competitive recovery on international markets. In this respect, it is required to balance the active tasks of the mining industry (enhancement of capitalization and profitability) and the long-term economic security. To this effect, it is intended to update the engineering economy personnel training in terms of development of better defined and higher performance competencies at the end of economic security in mining. The author lays foundations for the necessity of engineering economy personnel training in economic security of businesses in the mineral mining sector and presents the principles of selection of the required competencies of such specialists.