Guillaume Séguin
Senior Security Engineer at Université de Sherbrooke
Montreal, Quebec, Canada
Summary
👤
Senior🎓
Top SchoolGuillaume Séguin is a Senior Security Engineer based in Montreal with 19 years of experience specializing in authentication, cryptography, identity and PKI across C++, Python and Java environments. He blends deep hands-on engineering—having built enterprise-grade authentication and IAM solutions—with strategic architecture roles at major organizations including Google and the National Bank of Canada. Guillaume has a strong background in both Windows and Linux platforms and cloud-native deployments, and he routinely bridges application security, REST APIs and low-level crypto implementations. Beyond engineering, he teaches security topics at Université de Sherbrooke and has lectured widely, reflecting a commitment to knowledge transfer and workforce development. His long trajectory from embedded and C++ systems to modern cloud security gives him a rare perspective on secure system design across the full stack. Colleagues know him for pragmatic, standards-driven approaches to identity and cryptography that scale in large enterprise environments.
19 years of coding experience
17 years of employment as a software developer
Diplôme d'études collégiales Sciences pures, Diplôme d'études collégiales Sciences pures at Cégep de Sainte-FoyComputer Engineering Artificial Intelligence and robotics, Computer Engineering Artificial Intelligence and robotics at Polytechnique Montréal
English, French, Spanish
Stackoverflow
9,812reputation
1.4mreached
229answers
20questions
authentication
top-5%
ldap
top-1%
cryptography
top-5%
shell
top-5%
windows
top-1%
encryption
top-5%
Github Skills (100)
windows10
encryption10
node-notifier10
secrets10
vault10
ldap10
notification-area10
growl10
go10
access-management10
hashicorp-vault9
notification9
shell9
tencent-cloud9
authentication9
Programming languages (12)
Github contributions (5)
Paralint/paralint.github.io
Oct 2019 - Jul 2026
Contributions:1 review, 75 PRs, 93 pushes in 6 years 10 months
Paralint/vault-pki-starter
Dec 2017 - Jun 2020
Contributions:35 commits, 44 pushes, 5 branches in 2 years 6 months
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