Brennan St. John
Founder · Cybersecurity Engineer · Independent Penetration Tester
Brennan St. John founded St. John Cybersecurity to deliver independent security testing with enterprise rigor and practical, budget-conscious delivery, without the overhead of a big firm.
He works full-time as a Cybersecurity Engineer for a large manufacturing company, with daily hands-on experience defending enterprise IT and OT environments at scale. Earlier, as a Security Analyst at Techneaux Technology Services, a Lafayette-based MSP, he contributed to security engineering and vulnerability assessments across 30+ businesses in Louisiana, Texas, and Colorado.
Outside of client work, he's an active bug bounty researcher whose findings have been credited by companies including Adobe and 3CX, among them a critical-severity issue in a widely used enterprise product.
St. John Cybersecurity and his bug bounty research are conducted independently, outside of his employer.
Credentials
- EducationB.S. Cyber Operations, Dakota State University — an NSA-designated program
- CertificationsCompTIA Security+, CompTIA CySA+, ISC2 CC
- ResearchBug bounty findings credited by Adobe and 3CX, including a critical-severity issue under non-disclosure
- Day jobCybersecurity Engineer defending enterprise IT/OT environments in manufacturing
Elsewhere
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