Johannes Klein
Senior Security Infrastructure Operating Engineer
Greater Wurzburg Area Germany
Summary
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SeniorJohannes Klein is a Senior Security Infrastructure Operating Engineer with 12 years of experience, currently operating at Deutsche Telekom from the Greater Würzburg area. He holds high-level certifications—including CCIE #24156 (R&S), CCNP Security, and CISSP—demonstrating deep expertise in network and security architecture. Johannes focuses on building and maintaining resilient security infrastructure at scale, blending hands-on operations with rigorous security controls and compliance awareness. His long tenure at a major telecom underscores experience managing complex, high-availability environments and incident response processes. Colleagues describe him as a steady technical operator who pairs protocol-level knowledge with pragmatic solutions for real-world constraints. Beyond certifications, his profile suggests a strong commitment to continuous professional development in core networking and security domains.
12 years of coding experience
Github Skills (200)
react-native-bridge10
pdf-viewer10
changelog10
nodejs10
password-manager10
expressjs10
ruby10
build-system10
package10
release-automation10
cypress10
semantic-release10
security10
publish10
javascript10
Programming languages (19)
Github contributions (5)
meddevo/ngx-blocknote
Aug 2024 - Jan 2026
Angular implementation of BlockNote
Contributions:3 reviews, 21 PRs, 71 pushes in 1 year 5 months
angular
meddevo/affected-codeowners
Mar 2025 - Jul 2026
GitHub Action to determine which code owners are affected based on the changes in a pull request (PR).
Contributions:1 release, 2 pushes in 1 year 3 months
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