Sentinel was founded in 2018 by a small cell of former intelligence operators and offensive engineers. We build defense systems the way attackers build weapons — with conviction, with patience, and with the assumption that the other side is just as smart.
We protect the infrastructure that doesn't get a second chance — hospitals, power grids, financial rails, and the small teams building tomorrow's critical systems.
A world where attacker economics collapse — where breaching anything important is too slow, too loud, and too expensive to attempt.
Ex-NSA TAO. 14y offensive ops.
Built detection at FAANG-scale.
OSCE3. Physical entry specialist.
Former GCHQ. APT tracking lead.
We hire one operator per quarter. If you're better than your last engagement, send signal.