Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
engineer [ɛndʒɪˈnɪər] n (designer) инжене́р; (for repairs, also NAUT) меха́ник; (US) (RAIL) машини́ст
civil engineer инжене́р-строи́тель m
mechanical engineer инжене́р-меха́ник
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: