terminologist

terminologi puhekieltä A person who studies and uses terminology, especially in professional translation project management.
2005, Christiane Nord, Training for the New Millennium: Pedagogies for translation and interpreting, edited by Martha Tennent, Benjamins Translation Library, p. 218:

Translation practice during training should, at least in part, be organised in projects where each student has the chance to play various roles: that of client, of revisor, of terminologist, of documentation assistant, of free-lancer, of in-house translator working for a translation company, etc.