Timothy McKenzie — Co-Founder
With over 30 years of experience in Information Technology and Information Security, Timothy McKenzie is the founder and principal consultant of 3L337 Consulting, LLC. His company specializes in network and web application penetration testing, Red Team exercises, and Purple Team breach and attack simulations. His mission is to help organizations strengthen their security posture by exposing critical vulnerabilities and demonstrating the business impact of sophisticated adversaries. After over a decade building secure networks and systems, Timothy shifted his focus to penetration testing, exploit development, and adversary emulation. He has become known for his ability to stealthily operate within enterprise environments, using his diverse IT background to find and exploit security gaps. His work spans industries like finance, healthcare, and government, with a focus on post-compromise activities. As a SANS Principal Instructor, Timothy teaches SEC588: Cloud Penetration Testing and SEC542: Web Application Penetration Testing and Ethical Hacking, having co-authored the latter. He’s been committed to mentoring and sharing his expertise throughout his career, both in IT and Information Security. He says, “there’s not much value in putting information in my head if I am not going to share it with those around me. Teaching opens the door to offering what I know to others.” In addition to teaching and consulting, Timothy frequently speaks at security conferences and contributes to shaping the future of cybersecurity through his involvement with the GIAC Advisory Board. He holds numerous certifications, including OSCP, GXPN, GPEN, GWAPT, GAWN, GWEB, and GPYC. Timothy has led many Red Team engagements, helping clients identify critical weaknesses and bypass security defenses. He also designs tailored Red and Purple Team attack scenarios, ensuring organizations can address both technical and business risks. Passionate about giving back, Timothy has volunteered to teach penetration testing to high school students and continues to foster the next generation of cybersecurity professionals. Follow me on twitter: @timboloman
Stackforce AI infers this person is a Cybersecurity Expert specializing in penetration testing and security consulting.
Location: Denison, Texas, United States
Experience: 12 yrs 1 mo
Skills
- Penetration Testing
- Purple Team
- Vulnerability Assessment
- Adversary Emulation
Career Highlights
- Over 30 years in IT and Information Security.
- Founder of 3L337 Consulting, specializing in penetration testing.
- SANS Principal Instructor, mentoring future cybersecurity professionals.
Work Experience
SANS Institute
SANS Principal Instructor and Co-Author SEC542: Web Application Penetration Testing (1 yr 6 mos)
SANS Certified Instructor and Co-Author (SEC542) (4 yrs 8 mos)
3L337 Consulting
Owner / Principal Penetration Testing Consultant (3 yrs 8 mos)
Trustwave
Penetration Testing Principal Consultant (1 yr 5 mos)
SecureWorks
Red Team / Penetration Tester (6 yrs 6 mos)
United American Insurance Company
Penetration Tester / Senior IT Security Manager (1 yr 10 mos)
Education
Bachelor of Science - BS at Western Governors University
