na-adjective, noun which may take the genitive case particle 'no'
competent; suitable; qualified
Describes a person who has the right skills or qualities for a particular role or task. Often used in hiring or assignment contexts.
彼はこの仕事に適任だ。
He is suitable for this job.
適任者が見つかるまで募集を続けます。
We will continue recruiting until we find a qualified person.