GARRETT KOHLRUSCH // BLAINE, MN // HUNTING

I find what shouldn't
be there.

Security researcher specializing in offensive security, web application testing, and vulnerability discovery through responsible disclosure and bug bounty programs. Operator of GK Data LLC — a consultancy built around hunter-mentality testing, accurate findings, and clean remediation paths.
Findings
100+
CVE
#?Soon?
Halls of Fame
10+
Cumulative
~$secret+

A hunter's approach to offensive security — built after hours, proven in production.

I'm a Security researcher with 5+ years of hands-on web application testing and 100+ validated vulnerabilities across Fortune 500 companies, U.S. government systems, and major consumer platforms.

My core discipline is web and API offensive security: IDOR exploitation, authentication bypass, stored XSS with session exfiltration, CORS misconfiguration, SSRF escalation, JavaScript source analysis, and chained-impact reporting. I don't stop at the first PoC — I push until the real impact is on the page.

Alongside full-time work, I operate GK Data LLC, a cybersecurity consultancy delivering penetration tests and vulnerability assessments. I ship open-source tooling for the bug bounty community, write methodology breakdowns, and maintain active engagements on private Bugcrowd programs targeting critical infrastructure and consumer-scale platforms.

Currently open to security research, application security, and offensive security engineering roles — remote or on-site — in environments where security is taken seriously and research is encouraged.

More about Garrett
Apple Hall of Fame
TheTradeDesk Hall of Fame
NASA Hall of Fame
StateFarm Hall of Fame
Meta Accepted Report
Microsoft Accepted Report
Comcast Hall of Fame
View all recognitions & tools

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