Veteran – अनुभवी, कुशल

Noun – A person who has had long service or experience in an occupation, office, or the like.

Example – As a veteran of office politics nobody could afford to upset her.

Synonyms – Adept, battle-scarred, been around, disciplined, exercised, expert, from way back, hardened, inured, knows one’s stuff, long-serving, long-time, not born yesterday, of the old school, old, old-time, practical, practiced, pro, proficient, skilled, sophisticated, steady, trained.