We are looking for a Cybersecurity Network Security Specialist to join a project with a European public-sector client in Warsaw.

In this role, you will be responsible for administering, monitoring, and troubleshooting enterprise network security solutions across on-premises and cloud environments. You will work closely with infrastructure and cybersecurity teams to ensure secure, reliable, and scalable network services.

Responsibilities

The ideal candidate will be responsible for:

• Administering, monitoring, and troubleshooting network security solutions
• Providing 2nd line support to network and system users
• Creating and maintaining technical documentation and operational procedures
• Advising on network security improvements, upgrades, and best practices
• Supporting enterprise networking, cloud networking, and Zero Trust initiatives

Requirements

To excel in this role, you'll need:

• At least 5 years of relevant IT professional experience
• Bachelor's or Master's degree in Computer Science, Engineering, or a related technical field
• CCNP Security certification or equivalent vendor certification
• English at B2 level (CEFR) or higher

Technical Skills

• Strong understanding of TCP/IP, IP routing, and network security policies
• Experience with DNS, DHCP, NTP, and enterprise networking services
• Knowledge of wired and wireless networking technologies (WiFi, 802.1X/EAP)
• Good understanding of HTTPS, SSL/TLS, PKI, and X.509 certificates
• Hands-on experience with routers, switches, wireless controllers, and firewalls
• Experience administering large enterprise networks
• Knowledge of Windows and Linux network configurations
• Experience with stateful and stateless traffic filtering

Desirable Experience

• Palo Alto Firewalls, Panorama, and GlobalProtect
• Cisco switching environments
• VPN design and operations
• NAC and 802.1X implementations
• Azure networking and hybrid connectivity
• SASE / SSE solutions and Zero Trust Network Access (ZTNA)
• Micro-segmentation and Zero Trust architectures
• WAF and Load Balancing technologies (F5, Cloudflare, Citrix, or similar)

Please note that this role is only available to freelance/self-employed contractors and requires onsite work in central Warsaw. The initial contract duration is 12 months, with the possibility of extension for up to 48 months. For candidates relocating to Poland, relocation assistance can be provided. Applicants must hold citizenship of an EU member state.

If you find our proposal interesting and you meet the above requirements for the position, please don't hesitate to apply.

All applications will be treated strictly confidential.

About Comstream:

Comstream is a dynamic and growing organization with approximately 80 employees. We specialize in connecting top IT talent with ambitious growth companies, while also delivering outstanding customer support across a wide range of industries. In addition, we proudly develop and continuously improve our proprietary SaaS platform, Jobshark, designed for tech recruitment and freelancing.

Over the past few years, we’ve achieved significant growth — and we’re just getting started. If you're looking to join an international company with a welcoming welcoming, Scandinavian-inspired culture, Comstream could be the perfect fit. We’re committed to your professional development and offer an environment where you’re empowered to thrive.

At Comstream, teamwork is the foundation of everything we do. We foster a culture where every voice is heard, and where collaboration, freedom, and empowerment aren’t just values — they shape the way we work every day. Here, you’ll have the opportunity to make a meaningful impact.

For more information, please visit: www.comstream.eu