Specialist is defined as an expert in some field or a person who concentrates his or her energies on a specific field.
To champion is defined as to speak up in favor of or in support of a cause.
Great ability or skill
A person who has had long experience in some occupation, art, etc.; expert
A musician with masterly ability, technique, or personal style.
(Computing) A computer program or script used to simplify complex operations, often for an inexperienced user.
Find another word for grand-master. In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for grand-master, like: specialist, champion, master, master hand, past master, virtuoso and wizard.