old hand

Noun

idiomatic

(idiomatic) A person who is experienced at a certain activity.

Japanese Meaning

熟練者、経験豊富な人 / ベテラン

As an old hand at negotiation, Maria knew just how to steer the discussion toward a compromise.

交渉のベテランであるマリアは、議論を妥協点に導く方法をよく知っていた。

Sense（1）

(idiomatic) A person who is experienced at a certain activity.

My tax advisor is an old hand at dealing with auditors.

old hands

（ plural ）