About me

I am an IT‑Security Specialist with a strong background in Blue Team operations, SOC work, and incident analysis. In my most recent role at Stadt Wien – MA01 Wien Digital, I worked as an IT‑Sicherheitsexperte im Blue Team, where I supported WienCERT and investigated complex security incidents using SOC and SIEM tools . Before that, I contributed to the TU Wien IT department as a Network Security Expert, maintaining and documenting the university’s firewall architecture — but only for a really short time.

From 2022 to 2024, I served as an Information Security Manager at Frequentis AG, where I was responsible for the Microsoft Defender‑based SOC, handling security events, incidents, risk analysis, and employee awareness programs. My work included publishing regular security updates and running monthly phishing campaigns, which I also evaluated and reported on.

Earlier in my career, I gained hands‑on experience in IT support, infrastructure administration, and project implementation at ManageMED and ReAbility, giving me a strong operational foundation. I have worked across healthcare IT, enterprise environments, and public institutions, allowing me to understand security from multiple organizational perspectives.

My technical strengths include Microsoft Defender XDR, Tenable.SC, ADAudit Plus, Cisco IronPort, and various forensic tools. I also enjoy working with scripting and programming languages such as PowerShell, Python, Bash, C, C#, and Rust, enabling me to automate processes and analyze data efficiently. I am highly experienced with Linux systems, Windows Server environments, and a wide range of administrative tools including GLPI, Zabbix, PfSense, SQL Management Studio, and OpenVPN.

I hold a BSc in Information and Communication Systems from the FH Technikum Wien, supported by additional training in information security and Python programming. My professional approach is shaped by a mix of technical depth, analytical thinking, and a strong focus on practical, secure solutions.

Whoami?

  • Daniel Bretschneider

    I’m an IT specialist passionate about Linux, cybersecurity, and scripting. I live in Vienna and besides IT stuff I love travelling and music.