Jd Smith1
Hero
EABA was already recommended, and I was impressed with the (free) Quick Start rules.Give EABA v2 a look. Forum has some example of how others have used it for T2000 and other modern settings.
Drivethru has a 6 minute video with a quick overview on EABA. Likely enough to give you a gut feel for the system and if it is worth your time digging into more.
DriveThruRPG
preview.drivethrurpg.com
For modern techno thrillers I personally like NBA with the Double Tap expansion. Doesn't match your ask well so probably not a good suggestion for this.
