Duty first, self second.

责任第一，个人第二。

youdao

Duty first, self second.

职责第一，个人第二。

youdao

The first duty of any government must be to protect the interests of the taxpayers.

任何政府的首要职责都必须是保护纳税人的利益。

《柯林斯英汉双解大词典》

This is someone who puts duty first.

CNN: How 'soldier prince' Harry tore up royal rule book

It linked the fall to the decline in the number of people playing WoW - its most profitable business - as well as the fact that its most recent Call of Duty first-person shooter game was experiencing lower sales than its predecessor.

BBC: World of Warcraft subscriptions steady, says Activision

But naval duty came first, and with the outbreak of war, Philip was sent to sea.

CNN: Prince Philip: The man behind the queen