Senior engineer. According to Dong Lingsan's brief introduction, Dong Lingsan is a senior engineer certified by China Engineers Association. Therefore, the third level of Dongling in Heilongjiang is a senior engineer. Dong Lingsan, male, born in 197 1, Han nationality, party member, CPC, graduated from Heilongjiang Jiaotong University in 2002 1995 with a bachelor's degree and a master's degree in engineering in 201.