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  • Ehningen

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haydarkozat/README.md

Hi, I’m Haydar Kozat 👋

IT Systems Administrator | Microsoft 365 | Endpoint & MDM | Network & Support

I have more than 16 years of experience in educational IT, user and endpoint administration, networking and first-/second-level support. In Türkiye’s FATİH education project, I supported an environment with approximately 5,000 user accounts, Windows and Apple endpoints, around 200 mobile devices, LAN/WLAN, procurement, documentation and stakeholder coordination.

  • 📍 Current location: Türkiye
  • 🇩🇪 Relocation to Germany: from 1 September 2026
  • 🛂 National skilled-employment visa under Section 18b AufenthG, valid until 31 August 2027; employer change is subject to a suitable contract and review/approval of the visa conditions
  • 🗣️ German: ÖSD A1, actively progressing towards B1/B2 · English: B1 · Turkish: native
  • 🎯 Target roles: Microsoft 365 / Endpoint Administrator, IT Systems Administrator, 2nd-Level Support, School IT / Education IT

Core areas

  • Microsoft 365: Exchange Online, Teams, SharePoint/OneDrive, user/group/licence administration
  • Microsoft Entra ID and Microsoft Graph API
  • Windows and Apple endpoint management, mobile device management, rollout and lifecycle
  • LAN/WLAN, IP addressing, DHCP/DNS, firewall and VPN fundamentals
  • First-/second-level support, ticketing, escalation and technical documentation
  • Python automation, FastAPI, GitHub Actions and PowerShell fundamentals

Selected portfolio and lab projects

EntraFlow — portfolio project

Joiner–Mover–Leaver automation for Microsoft Entra ID / Microsoft 365 using Microsoft Graph. Focus: declarative user and licence administration.

SchulSync — Samba AD lab, 53 automated tests

Declarative synchronisation of school administration data from CSV with Active Directory / Samba AD.

Herrenberg-Schulnetz-Pulse — portfolio project

Monitoring dashboard for the near-real-time availability, status and alerting of 14 school networks.

AegisSOC — self-hosted lab / portfolio project

Security operations lab with network intrusion detection and automated alert triage. Findings are mapped to NIS2 and ISO 27001 concepts.

Current learning focus

  • German for IT support and interviews: A1 → B1/B2
  • PowerShell for Microsoft 365 and endpoint reporting
  • Endpoint/MDM administration and Microsoft cloud administration

Project labels are intentional: portfolio and laboratory work is presented separately from production experience.

Pinned Loading

  1. k12-cybersecurity-assessment k12-cybersecurity-assessment Public

    K-12 school cybersecurity maturity assessment based on NIST CSF 2.0 + KVKK (Açık kaynak siber güvenlik ve KVKK uyum kiti — Türk K-12 okulları için NIST CSF 2.0 üzerine kurulu)

    1

  2. stratosentry-nids stratosentry-nids Public

    A lightweight, Python-based Network Intrusion Detection System (NIDS) designed for real-time traffic analysis and seamless Microsoft Azure Log Analytics integration.

    HCL 2

  3. air-quality-eu-forecast air-quality-eu-forecast Public

    AI-powered PM2.5 forecasting for European cities, aligned with the EU Green Deal. XGBoost + Streamlit dashboard with Green AI carbon tracking.

    Jupyter Notebook 1

  4. souveraen-ki souveraen-ki Public

    🧠 Data-sovereign enterprise RAG + AI-agent platform (GDPR / EU AI Act) — fully self-hosted: Ollama · Qdrant · LangGraph · Langfuse · Keycloak. RBAC-aware retrieval, source-cited (anti-hallucination…

    Python 1