Senior Network Security Engineer - 24/7 On-Call

Ricoh Business Services; Warszawa; On-site; PLN 200,000 - 320,000; Full time

Job summary

Ricoh is seeking an experienced Network Security Engineer to operate and support our global security infrastructure from Warsaw. You will handle incidents, changes, and service requests, providing 24/7 on-call coverage and ensuring high-availability of data-center security services.

The role requires deep hands-on experience with major vendors (Juniper, Fortinet, F5, Palo Alto, Cisco) and a strong troubleshooting mindset.

Qualifications

• 8+ years of experience in network/security engineering (enterprise environments).
• Hands-on experience with Juniper SRX, Fortinet Firewalls/Proxy, and F5 LTM.
• Strong TCP/IP, routing & switching in data center environments.
• Experience with firewalls, VPNs, authentication systems, and 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

Tools

Juniper SRX

Fortinet Firewalls/Proxy

F5 LTM

Palo Alto

Cisco

CheckPoint

Arista

Meinberg

Job description

Ricoh is seeking an experienced Network Security Engineer to operate and support our global security infrastructure from Warsaw. You will handle incidents, changes, and service requests, providing 24/7 on-call coverage and ensuring high-availability of data-center security services.

The role requires deep hands-on experience with major vendors (Juniper, Fortinet, F5, Palo Alto, Cisco) and a strong troubleshooting mindset.