Sentinel Blue is a cybersecurity firm dedicated to protecting critical infrastructure from evolving digital threats, with a strong focus on the Defense Industrial Base. Leveraging deep expertise from military, intelligence, and private-sector cybersecurity backgrounds, we take a mission-driven approach to security—proactively hunting threats, responding to incidents, and strengthening resilience against adversary tactics. Our work goes beyond monitoring; we anticipate and neutralize cyber risks before they escalate, ensuring that defense contractors, infrastructure providers, and highly targeted organizations remain secure in an increasingly hostile digital landscape. In an era of cyber warfare and nation-state threats, Sentinel Blue stands as a trusted partner, delivering the intelligence and security posture needed to stay ahead of the next attack.