He teaches graduate and undergraduate classes in penetration testing, operating system security, and programming. Dr. Engebretson also serves as a Senior Penetration Tester for a Security consulting company in the Midwest. Before returning to academia, Dr. Engebretson spent 5 years as a Network Security Office for a financial institution. He recently published a book on the basics of hacking and penetration testing for Syngress and he works non-stop to weave past experiences into the classroom, integrate hands-on material, and open his student's eyes to the wonders of DEF CON.