Timothy Mckenzie
SANS Principal Instructor And Co-Author SEC542 Web Application Penetration Testing
Denison, Texas, United States
Summary
👤
Senior🎓
Top SchoolTimothy Mckenzie is a seasoned penetration tester and educator with 10+ years focused on offensive security and over 30 years in IT, now founder and principal consultant of 3L337 Consulting. He leads Red, Purple, and web/network pen tests that emphasize post-compromise realism and business impact, helping finance, healthcare, and government clients uncover and remediate critical gaps. As a SANS Principal Instructor and co-author of SEC542, he blends deep hands-on exploit development and adversary emulation with a passion for mentoring—extending his teaching from industry conferences to high school classrooms. Timothy’s practical edge comes from a decade building secure systems before shifting to offensive work, enabling him to stealthily find pathways defenders often miss. He contributes to the GIAC Advisory Board and holds a broad set of GIAC and offensive certifications (OSCP, GXPN, GPEN, GWAPT, GAWN, GWEB, GPYC). Outside client engagements he’s known for designing tailored attack scenarios that translate technical findings into actionable business risk reductions.
10 years of coding experience
2 years of employment as a software developer
Bachelor of Science - BS, Computer and Information Systems Security/Information Assurance, Bachelor of Science - BS, Computer and Information Systems Security/Information Assurance at Western Governors University
Github Skills (23)
wmi9
kerberos9
ntlm9
aix9
vcenter9
protocols9
python8
networking8
smb7
impacket7
netconf7
network7
netbios6
msrpc6
dcom6
Programming languages (1)
Github contributions (5)
timbo05sec/autocrack
Jan 2018 - Apr 2018
Contributions:2 releases, 15 commits, 24 pushes in 3 months
timbo05sec/Tools-n-Stuff
Apr 2016 - Jan 2023
Contributions:135 commits, 139 pushes, 1 branch in 6 years 10 months
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