有能で

capable and

→ 有能だ
phrase Rare #33,242
capable and The で form of 有能だ, used to connect 有能 with another description or action. Depending on context, it can also mean “being capable.”
JA: 彼女は有能で親切な先生です。
EN: She is a capable and kind teacher.

彼女は有能で頼りになる助手

She is a capable and reliable assistant.

彼は金持ちでも有能でもない

He is neither rich nor capable.

有能で信頼できる部下汚い言葉を使う

All capable and trustworthy subordinates use foul language.

— フォーリング・ダウン (1993)

彼は有能で信頼できる

He is capable and trustworthy.