Jason Keirstead
Founding CTO Head Of Engineering at Simbian
Fredericton, New Brunswick, Canada
Summary
👤
Senior🎓
Top SchoolJason Keirstead is a seasoned technology and security leader with 11+ years of experience building and scaling threat management and AI-driven security products, currently serving as Founding CTO and Head of Engineering at LangGuard.AI. He previously led large portfolios and hundreds of engineers as IBM's CTO of Threat Management and has held executive security roles at Cyware and Simbian, blending product strategy with operational security expertise. Jason pairs deep engineering roots—from early high-performance C++ systems and UI innovations at Q1 Labs to modern cloud-native architectures—with hands-on contributions to open-source security tooling, including enhancements to a widely used Log4Shell detector. Based in Fredericton, New Brunswick, he also brings governance and standards experience from a multi-year board role at OASIS Open. Known for turning complex security research into production-ready platforms, he combines technical rigor with executive-level strategy and a pragmatic focus on operationalizing detection and remediation.
11 years of coding experience
21 years of employment as a software developer
BCS, Software Engineering, BCS, Software Engineering at University of New Brunswick
Stackoverflow
109reputation
18kreached
1answer
1question
Github Skills (12)
regular-expression10
decode10
base6410
python10
base64url10
log-analysis10
security9
data-science-experience6
jupyter-notebook6
react6
github-ci4
githubaction-workflow4
Programming languages (15)
Github contributions (5)
Neo23x0/log4shell-detector
Dec 2021 - Dec 2021
Detector for Log4Shell exploitation attempts
Role in this project:
Back-end Developer / Security Engineer
Back-end Developer / Security EngineerContributions:5 commits, 1 PR, 4 comments in 1 day
Contributions summary:Jason primarily focused on enhancing the Log4Shell detector's functionality. Their commits refactored the code into a modular structure, added base64 decoding capabilities to handle obfuscated payloads. Further improvements included updates to the test cases and base64 decoding logic. The user also moved non-detection related code out of the main detection module.
log4shellpowershellexploitationdetector
IBM/data-import
Jul 2014 - Jan 2015
Contributions:15 commits, 1 PR, 1 push in 6 months
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