Can Muslims work in intelligence or national security?

Spying vs protecting

The Quran forbids prying into people's private faults:

Scholars explain that this is about hunting for people's sins and secrets. Gathering information to protect a community from violence is treated differently. The Prophet ﷺ himself sent scouts to gather information about enemy armies, for example before the Battle of the Trench, so intelligence work for defence has a basis in the Sunnah.

Roles that are usually fine

• Cybersecurity, protecting hospitals, power grids and banks from hackers.
• Analysis, translation and research for counter-terrorism or organized crime.
• Border, aviation and infrastructure safety.
• Policy and oversight work that keeps agencies within the law.

Muslims with language skills and cultural knowledge are often valued in these fields. Similar questions come up in policing. See Can Muslims become police officers?

Where the red lines are

• Targeting faith, not crime: watching people just because they're Muslim, or informing on innocent mosque-goers, is injustice and backbiting.
• Torture and abuse: never allowed, whatever the orders. Obedience is only in what is right (Sahih al-Bukhari 7257).
• Lies that harm the innocent: some deception is part of security work, but scholars stress it must never wrong innocent people.

Reporting a real crime, even by a Muslim, is a different and allowed act. See Can I report a crime by another Muslim to the police?

Scholars' views

Some scholars are cautious, because these agencies have at times been involved in abuses and in surveillance of Muslim communities. Others encourage Muslims to join so they can bring fairness from the inside. Both views agree that your own actions must stay just. Consider the specific role and talk to a trusted scholar.