Sébastien L
Red Team Senior Advisor at TransUnion
Canada
Summary
👤
Senior🎓
Top SchoolSébastien L is a Red Team Senior Advisor with 11 years of infosec experience, currently designing and executing advanced internal attack scenarios at TransUnion. He specializes in internal network and Active Directory exploitation, web and Wi‑Fi penetration testing, and has led physical and social engineering engagements for large financial and multinational clients. A Polytechnique Montréal computer engineering graduate, he combines practical security assessments with deep low‑level interests—having designed a VHDL processor implemented on a Xilinx Virtex‑6 and worked with MicroBlaze and Tensilica cores. Known for client-facing professionalism and security education, he has organized and taught AD labs, buffer overflow workshops, and CTF writeups through campus‑wide security events.
11 years of coding experience
4 years of employment as a software developer
Bachelor's degree, Computer Engineering, B.Ing, Bachelor's degree, Computer Engineering, B.Ing at École Polytechnique de MontréalPolytechnique Montréal
English, French, Chinese, Spanish
Github Skills (121)
mass10
vagrantfile10
osquery10
packer10
shell10
exploit10
user-friendly10
vcenter10
dfir-automation10
ansible9
api9
information-security9
cli9
vagrant9
rust9
Programming languages (12)
Github contributions (5)
Selora/PyNetScope
Feb 2018 - Jul 2022
Contributions:9 pushes, 2 branches in 4 years 5 months
Selora/ad_browser
Feb 2017 - Nov 2023
Contributions:9 pushes, 1 branch, 1 issue in 6 years 10 months
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