Jonathan Werrett
Head Of Security at Semgrep
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJonathan Werrett is a seasoned security leader and CISO based in San Francisco with 11 years of focused experience in security engineering and a longer track record across application security, incident response, and DevOps. He progressed from hands-on pentesting at NCC Group and SpiderLabs to leading security at Palantir, Fitbit (under Google), and now Semgrep, blending technical rigor with executive strategy. Jonathan is known for translating offensive security experience into pragmatic defensive programs and scalable security architectures for product teams. He holds an Executive MBA from AGSM @ UNSW and a technical bachelor’s in Computer and Mathematical Sciences, giving him both business judgment and deep technical grounding. An early devops practitioner from his Multimap days, he brings a rare combination of application-level security, operational reliability, and people leadership. Colleagues often cite his ability to mentor teams while rapidly maturing security posture without slowing product velocity.
10 years of coding experience
11 years of employment as a software developer
Executive MBA, Executive MBA at AGSM @ UNSW Business SchoolBachelor of Computer and Mathematical Sciences, Bachelor of Computer and Mathematical Sciences at The University of Western Australia
Stackoverflow
1reputation
0reached
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Github Skills (29)
program-analysis10
static-analysis10
semgrep10
security-scanner10
java10
security10
sast10
javascript9
static-code-analysis9
ruby9
python9
typescript9
linter9
gradle-plugin8
go8
Programming languages (4)
Github contributions (5)
werrett/cryptopals
Mar 2017 - Apr 2017
Contributions:21 commits, 16 pushes, 1 branch in 4 days
werrett/rpm-recipes
Dec 2016 - Dec 2016
Contributions:4 PRs, 10 pushes, 5 branches in 2 days
fpmrecipesrpmfpm-cookery
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