It would serve him right if he lost his job after how he treated his colleagues.

동료들을 그렇게 대했으니 그가 직장을 잃어도 싸다.

You left your umbrella at home? Well, that will serve you right for not checking the weather.

우산을 집에 두고 왔다고? 글쎄, 날씨를 확인하지 않았으니 자업자득이야.