Senior Network Security Engineer Data Center, 24/7 On-Call

Vastbouw; Warszawa; Hybrid; PLN 180,000 - 280,000; Full time

Job summary

Ricoh is seeking a seasoned network/security engineer to support our data center security infrastructure. You will tackle incidents, changes, and service requests within SLAs while providing 24/7 on-call coverage in a multinational, collaborative setting.

Required are 8+ years in enterprise network/security, hands-on Juniper/SRX, Fortinet and F5 experience, plus strong TCP/IP, VPN, and authentication skills. English fluency is essential in this global team.

Qualifications

• 8+ years of experience in network/security engineering (enterprise environments).
• Strong hands-on experience with Juniper SRX, Fortinet Firewalls & Proxy, F5 LTM (cloud/WAF exposure).
• TCP/IP, routing & switching in data center/service provider environments.
• Firewalls, VPNs, authentication systems, load balancing.
• Fluent English and ability to work in international teams.

Responsibilities

• Operate and support network security infrastructure in a data center environment.
• Handle incidents, changes, and service requests in line with SLAs.
• Provide 24/7 support (on‑call rotation: 1 week per month).
• Perform troubleshooting, root cause analysis, and performance monitoring.
• Convert high‑level designs into technical configurations.
• Manage vendor communication and escalations.
• Maintain high standards of documentation, approvals, and processes.

Skills

Network security engineering

Enterprise networking

Strong troubleshooting

English proficiency

Tools

Juniper SRX

Fortinet Firewalls

F5 LTM

Palo Alto

Cisco

CheckPoint

Arista

Meinberg

Job description

Ricoh is seeking a seasoned network/security engineer to support our data center security infrastructure. You will tackle incidents, changes, and service requests within SLAs while providing 24/7 on-call coverage in a multinational, collaborative setting.

Required are 8+ years in enterprise network/security, hands-on Juniper/SRX, Fortinet and F5 experience, plus strong TCP/IP, VPN, and authentication skills. English fluency is essential in this global team.