Sneakers

Many years after going on the run for an early computer crime incident, Marty (Robert Redford) has established what would now be called a pentesting company. Staffed by various misfits and a disgraced former CIA operative it's effective but not hugely financially successful.

When the NSA ask him to take a job targeting a US research institute, something outside their jurisdiction, he rejects it despite a big dangled paycheck . Marty still has the anti-authoritarian leanings from his youth and this has a whiff of spying on the public. When the NSA agents casually drop his real name he knows he has no choice.

No good will come of this.