Gunnar Leffler
Chief Cyber Incident Response Team at US Army Corps of Engineers
Bend, Oregon, United States
Summary
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Senior🎓
Top SchoolGunnar Leffler is a seasoned information security leader and engineer with 13 years of experience, currently heading the Cyber Incident Response Team at the US Army Corps of Engineers. A former active-duty Army professional, he blends hands-on incident response, intrusion analysis, and system modernization with proven leadership across multidisciplinary teams. He has modernized SIEM and web-filtering infrastructures using the Elastic Stack, built web-scanning and monitoring programs, and written custom tooling in Python and Go to streamline operations. OSCP certified and a top-ranked competitor on HackTheBox and TryHackMe, he maintains an active offensive-defensive skillset that informs practical defensive strategies. Based in Bend, Oregon, Gunnar’s background spans SCADA and hydro-meteorological systems to enterprise incident response, giving him uncommon depth in both operational technology and IT security. He is known for integrating new tooling rapidly into production environments to reduce dwell time and harden attack surfaces before adversaries exploit them.
12 years of coding experience
7 years of employment as a software developer
Bachelors, ENGINEERING, Bachelors, ENGINEERING at Oregon State University
Github Skills (36)
python-development9
packaging9
virtualenv9
pip9
python8
energy8
nodejs8
environmental8
pipfile8
node-http7
transport7
markdown7
node-opcua7
documentation6
cross-platform6
Programming languages (4)
Github contributions (5)
gunnarleffler/tslite
Jan 2015 - May 2022
Contributions:26 pushes in 7 years 5 months
gunnarleffler/hydroJSON
Jun 2014 - Oct 2017
Contributions:6 commits, 8 pushes, 3 comments in 3 years 4 months
hydrojsonenvironmentalenvironmental-data
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