Goyo Panadero will move into Corujo's joint MD role, overseeing the agency's operations in Spain and Portugal, where it employs 180 people across five offices.
A statement from Llorente & Cuenca said the new division had been created to combine HR with "organisation and innovation".
It said: "It is a key area for responding to the geographical development and size achieved by the consultancy firm as it expects to extend its workforce beyond 500 professionals in 2016. Through this initiative, Llorente & Cuenca is placing people at the core of its strategies, fully aware that the talent of all those who work at the company is its main asset."
Both Corujo and Panadero will form Llorente & Cuenca’s global steering committee when they begin in their roles on 1 February.
Llorente & Cuenca is currently targeting global expansion, following a €6.4m ($7.1m, £4.6m) capital injection last year from French private equity firm MBO Partenaires.