Looking for a job

Markus Gebhard

@markusgebhard

IT security specialist at PORR Group handling security incidents and Microsoft Sentinel/Defender alerts.

At PORR Group, I handle IT security incident response, analyze Microsoft Sentinel and Defender alerts, and contribute to security concepts for IT infrastructure and strategy papers. I also oversee external SOC services.

At Hexagon (Leica) Geosystems Services AT, I handled security incidents, contributed to infrastructure security concepts and strategy papers, collaborated in ISO audits, and advised internal customers on security issues.

Earlier, I managed network security and infrastructure work at Drägerwerk AG & Co. KGaA and MTU Aero Engines AG, including firewall and proxy security, secure network design, and operational LAN/WAN control. At Renata Batteries (SWATCH Group Switzerland), I worked across IT and infrastructure security, including team leadership and budget planning.

Experience

Work history, roles, and key accomplishments

Current

IT-Security Incident Response

Current

PORR Group

Sep 2025 - Present (1 year 1 month)

Developed security concepts for IT infrastructure, collaborated on strategy papers, controlled external SOC, and analyzed Microsoft Sentinel/Defender alerts.

IT Security Incident Response Microsoft Sentinel Microsoft Defender SOC

Systems Engineer IT-Security

Hexagon (Leica) Geosystems Services AT

Aug 2023 - Aug 2025 (2 years)

Performed IT-security incident response, developed security concepts for IT infrastructure, collaborated on strategy papers and ISO audits, and advised internal customers on security issues.

IT Security Incident Response ISO Auditing Cybersecurity Concepts

IT, IT Security, Security Manager

Renata Batteries (SWATCH Group Switzerland)

Jun 2022 - Jul 2023 (1 year 1 month)

Managed IT infrastructure and a small team, served as IT-Security Officer and Security Officer, handled budget planning, and provided consultancy for internal customers.

IT Security Security Management IT Infrastructure Team Leadership Budget Planning

IT Security Manager

Drägerwerk AG & Co. KGaA

Sep 2021 - May 2022 (8 months)

Responsible for network security, firewall, proxy, and provider management, including change and incident handling, provider control, consulting, and troubleshooting.

Network Security Firewalls Proxy Provider Management Incident Handling Troubleshooting

Network Infrastructure Security

MTU Aero Engines AG

May 2008 - Aug 2021 (13 years 3 months)

Responsible for security, planning, and operative control of network infrastructure, including managing external teams, defining secure designs, and implementing security devices.

Network Security Firewalls Proxies Email Security Gateways WAN LAN DMZ Security Design Troubleshooting

Server Infrastructure Planning

O2 Germany – Telefonica

Aug 2000 - Apr 2008 (7 years 8 months)

Planned server infrastructure for Windows 2003/x86, identified server needs, managed budgets, lifecycle, and external service providers, and defined hardware/software standards.

Server Infrastructure Windows 2000 2003 Server Budget Planning Lifecycle Management Procurement Project Management