The year 2023 marks the 100th anniversary of the birth of a prominent Russian mathematician, PhD in Physics and Mathematics, Associate Professor Mikhail Isaakovich Kliot-Dashinsky (1923–2000), who for almost fifty years taught higher mathematics to students of the Leningrad Engineering and Construction Institute (later St. Petersburg State University of Architecture and Construction), whose name is well known to specialists in the field of linear algebra, as he is the author of the textbook “Vectors and Matrix Algebra”, which has been repeatedly reprinted. Unfortunately, he is rarely mentioned in publications of historical and mathematical type. Being a physicist by education and becoming a mathematician actually by fate, Mikhail Isaakovich gravitated in his scientific work to questions concerning the application of mathematics to the solution of physical problems. The article gives a brief biography of the scientist, reconstructs little-known facts from his biography, and describes his scientific and pedagogical heritage.