Steven Johnstone
Chief Insecurity Officer at Something something AI something something something Dark Side!
Lanark, Scotland, United Kingdom
Summary
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Senior🎓
Top SchoolSteven Johnstone is a security-focused software leader and mathematician with 11 years of experience building and hardening systems, currently serving as Chief Insecurity Officer at a stealth AI security venture in Lanark, Scotland. He combines deep hands-on engineering—kernel, network stack, embedded systems and Go development—with strategic security leadership, having led PSIRT, ISO 27001 implementations, and federal product evaluations. Previous roles span CSO and lead security engineering positions where he blended programming, manufacturing test automation, and threat-driven product work. A PhD mathematician, he approaches security problems analytically, enjoying breaking things to discover practical, auditable fixes. He’s comfortable at the intersection of product, operations and engineering, mentoring teams while remaining a hands-on tester and builder. Despite a low public GitHub footprint, his track record shows influence on secure product lifecycles and applied systems security across startups and established vendors.
11 years of coding experience
13 years of employment as a software developer
PhD, Mathematics, PhD, Mathematics at University of StrathclydeExchange program, Mathematics, Exchange program, Mathematics at Queen's University
English, Dutch
Github Skills (148)
programming-language10
parser10
interpreter10
golang10
compiler10
goplus10
go10
kubernetes-ui10
odin10
parsing10
parser-generator10
parse10
antlr9
grammars9
swift9
Programming languages (8)
Github contributions (5)
stevenjohnstone/learn-relearn
Dec 2022 - Jan 2025
Contributions:89 pushes, 2 branches in 2 years 1 month
stevenjohnstone/blog
Jan 2019 - Aug 2021
Contributions:73 pushes, 1 branch in 2 years 7 months
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