Erwin Geirnaert

Erwin Geirnaert is a Senior Security Expert with a main focus on offensive security. As a penetration tester with 20 years experience he knows how to attack an application and test for security holes. Combining this with his passion for teaching web security to different kinds of people like developers, security engineers, CISOs, ... he now wants to share his experience with the Udemy community.

Besides starting his own companies ZIONSECURITY (sold in 2019) and Shift Left Security he is also an active bug bounty hunter for Detectify, Synack Red Team, Bugcrowd and HackerOne.