Graduate of the Irkutsk Polytechnic Institute 1973, Sanjdorj worked in the mining industry of Mongolia for more than 40 years. Participated in the search and exploration of ground water resources across Mongolia. He was supervising water exploration, environment protection and geology. Sanjdorj is Emeritus Vice President of the Oyu Tolgoi Company. He has been awarded a title of Honorary Worker of the Industry of Mongolia. He is currently a Consultant for the company.