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Christoph J. - IT Security

Specializing in infrastructure hardening, ISO/IEC 27001 readiness, and BSI IT-Grundschutz compliance.

Audits, Standards & Compliance
  • ISO 27001:2022: Lead Auditor qualification & pragmatic ISMS implementation.
  • BSI IT-Grundschutz: Standard 200-x frameworks & certified Praktiker expertise.
  • Gap Analysis: Evaluating readiness, non-conformities & policy baselines.
Defensive Hardening & Systems Engineering
  • Linux Hardening: Kernel configuration, access control & host security baselines.
  • Infrastructure: Virtualization admin, server security & attack surface reduction.
  • Containment: Container environment baselines & segregated network architectures.
Applied AI & Secure Tooling
  • Local AI: Self-hosted inference for private, offline document workflows.
  • Desktop Tools: Lightweight, offline-capable utilities with local database storage.
  • Automation: Custom scripts for routine admin, security tasks & data parsing.
See all skills and experience

Personal Projects

Bachelor's Thesis

For my bachelors thesis, I developed a consultant management application that automates the creation of tailored profiles to support project acquisition. The system leverages Large Language Models to automatically extract specific project requirements from unstructured text documents. Utilizing these AI-generated insights, the application dynamically optimizes the consultant profiles to perfectly match client needs.

PythonSveltePostgreSQLpgvectorLocal AIFastAPIllama.cppTypeScript
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Hermitage

A personal Retrieval Augmented Generation system powered by local AI models helping me organize my data. A huge help during my bachelors thesis.

PythonRetrieval Augemented GenerationLocal AIllama.cpp
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Dossier

Dossier is a privacy-first, local-only Personal CRM built with Tauri and Svelte. It helps manage your network, track interactions, and remember important milestones.

SvelteTypeScriptTauri
c-jaenicke/dossier (github.com)
sec-linux

A collection of guides, security profiles, and more to secure various Linux systems. Including VM setups and separate networks. This is a work in progress.

LinuxDebianUbuntuopenSUSEISO/IEC 27001BSI-IT-Grundschutz
c-jaenicke/sec-linux (github.com)
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