Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
consultant [kənˈsʌltənt] n (MED) врач-консульта́нт; (other specialist) консульта́нт
cpd
consultant engineer/paediatrician инжене́р-/педиа́тр-консульта́нт
legal consultant юриско́нсульт
management consultant консульта́нт по ме́неджменту
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.