Rei Yamaguchi
ITエンジニア at (株)サイバーエージェント [CyberAgent]
Chiyoda, Japan
Summary
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SeniorRei Yamaguchi is an IT engineer with 11 years' experience leading corporate IT operations at CyberAgent, responsible for hands-on design and implementation of reliable internal IT services. As a CSIRT member he actively manages incident response and security operations across ID/IAM, endpoint, and SaaS environments, prioritizing “non-disruptive operations” and security that works for end users. He brings full-stack roots from network to software, enabling pragmatic solutions that bridge infrastructure, tooling, and developer needs. Based in Chiyoda, Japan, Rei combines operational rigor with an operator’s mindset—focusing on measurable improvements that keep business services running while reducing security risk. An often-overlooked strength is his emphasis on making security processes executable by frontline teams, not just policy owners.
12 years of coding experience
Github Skills (22)
console10
image10
windows10
command-line10
windows-terminal10
cmd10
image-upscaling9
windows-console9
ai-image9
ai8
logfile8
electron8
ldap7
wordpress7
linux7
Programming languages (6)
Github contributions (5)
unagi/wp-generic-openid-connect
Sep 2014 - Jul 2018
OpenID Connect Plugin for Wordpress
Contributions:21 commits, 6 PRs, 6 pushes in 3 years 11 months
openid-connectwordpress
unagi/dotfiles
Jun 2015 - Mar 2019
Contributions:4 PRs, 20 pushes, 6 branches in 3 years 9 months
dotfilesvimzsh
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