post-qualified

Having been qualified (in some profession) for the specified time.

Japanese Meaning

資格取得後、定められた期間その資格を保持している状態 / 一定期間、職業資格を有している状態

The post-qualified engineers were assigned to mentor new hires during their probation.

所定の期間、資格を有しているエンジニアが新入社員の試用期間中の指導役に任命された。

Sense（1）

Having been qualified (in some profession) for the specified time.

How much experience does he have? He's four years post-qualified.