Network Operations Engineer

Power Factors

. Operate and maintain OT firewalls, switches, routers, VPN gateways, and network devices .

Posted 11/3/2026full-timeAthens • GreeceMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in operating and maintaining OT firewalls, switches, routers, and VPN technologies while ensuring network security and operational continuity. Proficient in troubleshooting network connectivity issues and implementing changes in accordance with OT security and operational procedures.

Highest-signal resume keywords

Network SecurityVPN TechnologiesCisco Catalyst SeriesFortigate FirewallsTCP/IP Model

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Network TroubleshootingFirewall ConfigurationIP RoutingVPN ManagementNetwork Device UpgradesConfiguration ManagementRoot-Cause AnalysisChange ManagementDocumentation MaintenanceLifecycle Management

Soft Skills

Clear CommunicationClient Interaction

Tools & Technologies

Cisco RoutersHP Aruba SwitchesFortigate FirewallsOpenVPNIPSecSSL VPN

Certifications & Qualifications

Cisco CertificationFortinet CertificationJuniper Certification

Industry Keywords

OT SecurityNetwork InfrastructureIncident ManagementOperational ContinuityNetwork Diagrams

Tech Stack

Tools & technologies

Cyber SecurityDNSFirewallsLinuxSMTPSwitchingTCP/IP

About the role

Key responsibilities & impact

Operate and maintain OT firewalls, switches, routers, VPN gateways, and network devices
Manage and troubleshoot Client-to-Site and Site-to-Site VPNs for secure remote and inter-site connectivity
Perform firewall upgrades, configuration changes, rule management, and migrations
Troubleshoot OT network connectivity, routing, switching, firewall, and VPN issues
Perform network device upgrades, configuration backups, replacements, and lifecycle activities
Implement changes following OT change-management, security, and operational procedures
Maintain network diagrams, firewall/VPN documentation, device inventories, SOPs, and troubleshooting procedures
Support incident management, root-cause analysis, and preventive actions
Coordinate with Cybersecurity, engineering teams, vendors, and site personnel
Support network projects, infrastructure improvements, and OT security initiatives while maintaining system availability and operational continuity

Requirements

What you’ll need

At least 3 years of experience as a Network Engineer
Solid understanding of the TCP/IP model and key internet protocols, including DNS, SMTP, and HTTP
Familiarity with authentication and authorization schemes
In-depth knowledge of network security, IP routing, and VPN technologies, including SSL VPN, IPSec, and OpenVPN
Hands-on experience with Cisco Catalyst Series and HP Aruba switches
Experience with Fortigate and Cisco firewalls and routers
Ability to communicate clearly and patiently and interface directly with clients in English
Network/security certifications such as Cisco, Fortinet, or Juniper are preferred
Experience with Linux environments is considered an asset

Benefits

Comp & perks

Opportunities for professional growth
Support for professional development
Equal opportunity and inclusive culture