Jesus tells us not to judge others. Does this mean that we should avoid jury duty or working as judges?
Jesus' words are meant to remind us that we cannot know what other people are thinking and feeling. In fact, we cannot even know what people are doing, as appearances are often deceiving. God is the ultimate judge of us all.
That does not mean we have no duty to help maintain order, justice, and peace in society. If all Christians were to abandon roles in law enforcement and the judicial system, the result would be disastrous.
Catholics should take all their civic duties—including jury duty—seriously.