What is Consultancy ?
Consultancy is (noun) 1. the act of giving advice on a subject that you have a lot of knowledge about He offers a consultancy service. She runs a consultancy firm, offering advice on planning. Since he’s been made redundant, he’s been doing consultancy work. 2. the post of consultant in a hospital She was appointed to a consultancy with a London hospital.
source: Easier English, Student Dictionary Upper Intermediate Level