System Administrator (Firewall Administration) EA-1308

NAXCON GmbH, located in the heart of Freiburg, is at the forefront of the German IT and engineering industry.

Our experts have extensive knowledge in software and hardware development, state-of-the-art electronics, and future-oriented technologies such as artificial intelligence and virtual reality.

We are not only dedicated to project work for our customers, but also intensively pursue in-house innovation projects as well as research & development. Renowned companies from a wide range of German industries place their trust in us - demonstrating the outstanding expertise and commitment of our engineers.

Position: System Administrator (Firewall Administration)

Location: Bonn Hardtberg, Frankfurt, Berlin, München, Wilhelmshaven, Rheinbach, Leipzig (One person will be hired for each location)

Field: Defence

Type: Full-time/80% Remote

Position Overview

The System Administrator is responsible for analyzing, implementing, and documenting firewall configurations within a secure IT infrastructure environment. The role ensures that required network communications are enabled in a compliant and secure manner while adhering to established IT security standards and policies.

Key Responsibilities

Firewall Request Processing

• Analyze and evaluate incoming firewall access requests from ticketing systems
• Review technical requirements such as source and destination systems, ports, protocols, and communication flows
• Coordinate with requestors, application owners, and network teams to clarify requirements
• Assess requests in accordance with IT security policies

Firewall Rule Implementation

• Configure and implement firewall rules in centralized and decentralized environments
• Modify existing rule sets following the principle of least privilege
• Execute changes in accordance with established change management procedures
• Ensure minimal impact on existing network communication

Testing & Validation

• Perform functional testing of implemented firewall rules
• Analyze network traffic and system logs to identify and resolve issues
• Support validation activities with relevant stakeholders

Documentation

• Maintain accurate and complete documentation of firewall configurations
• Update network documentation and configuration records
• Ensure all changes are documented in compliance with audit and regulatory requirements

Operations & Optimization

• Regularly review firewall rules for relevance, efficiency, and security compliance
• Identify and remove outdated or redundant rules
• Contribute to the continuous improvement of firewall and network processes

Qualifications & Skills

Education & Certifications

• Degree in Information Technology, Computer Science, or a related field, or equivalent vocational training
• Certification in networking or security technologies (e.g., CCNP or comparable) is preferred

Professional Experience

• At least 2 years of experience in network administration or a similar role
• Practical experience in firewall administration and network environments

Technical Skills

• Solid understanding of firewall technologies and network protocols
• Experience with IT service management and change management processes
• Ability to analyze network traffic and troubleshoot connectivity issues
• Familiarity with ticketing systems and documentation processes

Languages

• German: C1 level
• English: B1 level

Soft Skills

• Strong teamwork and collaboration skills
• Professional communication and interpersonal abilities
• Structured and solution-oriented working approach

Additional Information

• Hybrid working model with a high remote work share (approx. 80%)
• Work in a structured and security-focused IT environment

What we offer:

• Join a cosmopolitan and internationally mixed team: We welcome individuals from all backgrounds and cultures to contribute their unique perspectives and talents to our team.
• Polish your German language skills: If you are looking to improve your German language skills, we offer a supportive environment where you can practice and develop your language abilities: whether you are a beginner or an advanced speaker.
• Benefit from a fixed contact person from the company: We understand the importance of having a reliable point of contact within the company. That's why we assign a dedicated contact person who will provide guidance and support throughout your employment with us.
• Professional growth and development: With us, our engineers can immerse themselves in new industries or projects after just 1-2 years and actively transfer knowledge.
• Enjoy regular team events with the company: We believe in the power of team building and fostering positive relationships within the workplace. That's why we organize regular team events to promote collaboration and strengthen our team bonds.
• Competitive compensation package: At NAXCON, we believe that our engineers are our greatest asset. That's why we offer a comprehensive and competitive compensation package that includes a salary commensurate with experience and expertise.