Jeff Geiger
Principal IR Analyst at Elastic
Lincoln, Nebraska, United States
Summary
👤
Senior🎓
Top SchoolJeff Geiger is a Principal IR Analyst and security-focused DevOps practitioner with 14 years of experience hardening enterprise and cloud environments and leading incident response and network security monitoring programs. He has held senior roles from CTO/co‑founder to Principal NSM Engineer and security director at companies including Elastic, CrowdStrike, and Selfbook, pairing hands-on tool development with operational leadership. A long-time open-source evangelist, Jeff builds and maintains practical info‑sec tooling (see rocknsm.io and his GitHub) to make adversaries work harder for every byte they touch. His background spans military cyber defense, product architecture, and DevOps, giving him a rare blend of tactical IR expertise and scalable engineering judgment. Based in Lincoln, Nebraska, he’s known for translating threat hunting and NSM insights into repeatable, community-driven solutions.
14 years of coding experience
26 years of employment as a software developer
US Army 251A Warrant Officer Basic CourseTelecommunications Management, Telecommunications Management at University of Nebraska at KearneyBachelor of Science (BS), Computer Science, Bachelor of Science (BS), Computer Science at University of Arkansas Grantham
Github Skills (43)
automated-deployment10
rhel10
loader10
suricata9
zeek9
docker9
installers9
elastic9
fluentd9
risk-assessment8
kibana8
dashboard8
script7
iso7
ids7
Programming languages (7)
Github contributions (5)
rocknsm/rocknsm.io
Aug 2018 - Mar 2020
Web content for http://rocknsm.io
Contributions:11 commits, 2 PRs, 8 pushes in 1 year 6 months
jeffgeiger/recipes
Jan 2018 - Feb 2021
Contributions:10 pushes, 1 branch in 3 years 1 month
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.