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 (37)
yum10
automated-deployment10
rhel10
elastic10
fluentd10
kibana9
dashboard9
iso9
installer9
installers9
risk-assessment8
script8
openscap7
ja37
ids6
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
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