About Us
Bridging the Security Gap for SMBs and Startups
The Journey
Mark Castro's cybersecurity journey began in the trenches of Managed Service Providers (MSPs), where he gained foundational experience in securing diverse IT environments. His expertise quickly escalated as he took on the critical responsibility of protecting the private assets and digital footprint of a high-net-worth family in Austin, Texas. This role demanded an uncompromising approach to privacy, threat intelligence, and bespoke security architecture.
Transitioning from private wealth security to the enterprise scale, Mark joined the ranks of Big Tech. There, he specialized in Vulnerability Management and Application Security (AppSec), securing complex, cloud-native infrastructures and integrating security seamlessly into the Software Development Life Cycle (SDLC) for products used by millions.
The Mission: Vulnlogic
Despite the rapid evolution of cyber threats, a glaring gap remains in the market: most SMBs and Startups rely on traditional MSPs for their IT needs, but these providers often lack dedicated, elite security engineers on their teams. They manage IT, but they don't proactively hunt vulnerabilities or secure application code.
Mark founded Vulnlogic Cybersecurity to fill this exact void. By bringing Big Tech security engineering practices to growing businesses, Vulnlogic provides the proactive defense, vulnerability management, and AppSec expertise that modern companies need to survive and thrive against sophisticated adversaries.
Private Wealth Security
Bespoke asset protection and threat mitigation for high-net-worth individuals in Austin, TX.
Big Tech AppSec
Enterprise-scale Vulnerability Management and Application Security engineering.