Olli-Pekka Niemi has been working in Internet security since 1996. He has experience in offensive security as a Penetration Tester and in defensive security as a System Administrator. Since December 2000, he has been working for Stonesoft R&D, developing Intrusion Prevention Systems and Next Generation Firewalls. His main R&D interests are analyzing network-based threats and evasion research. Mr. Niemi is the founder and head of the Stonesoft Vulnerability Analysis Group (VAG). He is also the Chief Research Officer of Stonesoft. Mr. Niemi has given presentations at various security conferences such as T2, DeepSec, Positive Hack Days, and SIGCOMM.