Senior Cyber Security Defender Engineer with German (m/f/d)

Role Summary

Purpose

We are looking for a senior technical expert responsible for the design, implementation, and operation of security technologies, software deployment, and data center operations. The candidate will play a key role in ensuring high availability, security, and performance of IT infrastructure.

Team description

Join the team at Operational Services GmbH, within Deutsche Telekom Systems Solutions Slovakia, providing opportunities for talented IT professionals in Slovakia. OS is one of the leading ICT service providers in the German market and is considered the backbone of digitization for medium-sized companies. With almost 1,000 highly qualified employees, OS develops and operates state-of-the-art IT systems for our customers, ensures long-term system support, and maintains the availability of critical business processes.

If you are excited to join an English and German-speaking team that values innovation and teamwork, our team would be the perfect fit for you.

Languages

English – Intermediate (B1)

German – Upper Intermediate (B2)

Responsibilities

• Operate, maintain, and troubleshoot security solutions in data center and hybrid/cloud environments.
• Handle incident, change, and problem tickets related to security systems.
• Deploy, configure, and maintain Microsoft Defender, Sophos, and related security tools.
• Continuously improve the reliability, performance, and security of IT services.
• Collaborate with internal teams, customers, and vendors on implementation projects.
• Support onboarding, training, and documentation for security tools and procedures.
• Work independently or as part of the team to implement and maintain security solutions.
• Operate and manage Microsoft Defender (Endpoint, Cloud, Identity, Cloud Apps, O365).
• Operate and manage Sophos Intercept X (EDR/XDR) and Sophos SG/XG Firewalls.
• Install, configure, and maintain security-related tools and monitoring systems.
• Ensure security policies and best practices are implemented across infrastructure (servers, networks, cloud, endpoints).
• Some training can be provided if required, but a strong foundational knowledge is essential.

YOU WILL SUCCEED IF YOU

• The ideal candidate will have at least 3 years of experience in:
• Microsoft Defender solutions (Defender XDR)
• Administration of Endpoint/Extended Detection and Response (EDR/XDR) solutions
• Operation of Microsoft Defender suite (Endpoint, Cloud, Identity, Cloud Apps, O365)
• Operation of Sophos Intercept X (EDR/XDR) and Sophos SG/XG Firewalls
• Installation and maintenance of related security tools
• Solid overall IT infrastructure knowledge (servers, networks, cloud, endpoints) with a strong security focus

Requirements

Desired Certifications

• SC-900: Microsoft Security, Compliance and Identity Fundamentals
• SC-200: Microsoft Security Operations Analyst
• Sophos Certified Technician – Central Endpoint and Server

Other Criteria / Requirements

• Strong hands-on mentality and structured in planning and execution.
• Experienced in implementing security solutions in enterprise environments.
• Team player with ability to work independently when needed.
• Willingness to learn and develop further in security technologies; training can be provided if required.

Possible specialisation

• Participation on on-call duties , independent solving and troubleshooting of incidents and errors within defined expertise.
• We are offering base salary depending on seniority level and previous experience of candidate. In addition to base salary we provide variable part and other financial benefits. Base salary will not be lower than 1850€ /brutto.

Benefits

WHY SHOULD YOU CHOOSE US?

We believe in balance between work and personal life. An attractive and extensive work-life balance portfolio guarantees lasting motivation for employees and thus a better quality of life, promotes physical and mental well-being and contributes to a positive work environment. All this with the aim of providing more freedom in reconciling work, career growth, private life and individual lifestyle. Therefore we offer to our employees over 25 different benefits to improve their personal and professional life in these areas:

• Financial benefits
• Benefits with focus on learning and development
• Benefits with focus on health and sport
• Benefits with focus on family and work – life balance

For more information about our benefits click to Benefits

• Please be informed that our remote working possibility is only available within Slovakia due to European taxation regulation.

About the Company

Our brand Deutsche Telekom IT Solutions Slovakia entered the life of Košice region in 2006 under the name of T-Systems Slovakia and ever since has been inextricably linked with the region when became one of the founding members of Košice IT Valley. We have managed to grow from scratch to the second largest employer in the eastern part of the country with more than 3900 employees. Our goal is to proactively find new ways to improve and continuously transform into the type of company providing innovative information and communication technology services.