4-6K. According to the query of the official website of Heze Big Data Center, the monthly salary of its operation and maintenance engineers is in the range of 4-6K, with the requirement of bachelor's degree or above. Job description of the operation and maintenance engineer: mainly responsible for data center infrastructure and IT network operation and maintenance daily inspection, responsible for all professional equipment in the data center temporary trouble shooting, maintenance of the data center, regular backup of all system data, etc..