Henderson began his career in computer security in 1993, specializing in penetration testing as well as security and vulnerability research. As Director of Application Security Services at SpiderLabs, he leads the team responsible for Application Penetration Testing, Code Review, Secure Development Training, and other elite application security consulting services.

Prior to joining SpiderLabs, Henderson ran his own boutique application security testing firm. HendersonĀ¹s firm provided offensive security services to a wide variety of clients in the United States and Europe.  Henderson speaks frequently at major industry events and conferences, including BlackHat, DEF CON,  AppSec US, AppSec EU, SOURCE, and the International Association of Financial Crime Investigators convention.