This article examines the experience of strategic cooperation between a mining software developer and a large mining company in adapting the Mining and Geological Information System (MGIS) to the company’s corporate requirements. The market-out of foreign MGIS from Russia placed large companies in a particularly difficult situation, as they had been building solutions based on imported software products for many years. The task of software import substitution in the mining industry, which deals with complex geotechnical systems, should be considered as a managed interdisciplinary scientific and engineering process requiring a systematic methodological approach. We note the importance of assessing the level of digitalization of existing business processes for engineering support of mining operations in forming a rational plan for software adaptation and modification. Given the requirement for a quick solution to the import substitution issue, we must consider the internal development of MGIS when coordinating with the industrial partner a work plan for functionality modification. This ensures the development of a competitive digital system for engineering support of mining operations not only for the company but for the entire mining industry. We present the main directions for modifying the MGIS functionality in the fields of geology, mine surveying, and geotechnology, along with examples of developed digital tools. We note that experts have mostly resolved the tasks of developing MGIS to meet the requirements of PJSC ALROSA, and the priority has become the development of software tools for medium-term and short-term planning of open-pit and underground mining operations. We provide a functional diagram of the planning unit. For the development of MGIS, we consider building the Mining Geological Digital Platform (MGDP). This platform provides the ability to create working tools (units) through the use of API functions and dynamic attachment of units to the MGDP system core.