Sr. Network IT Engineer

Senior Network Engineer

Join the team at FORTNA as a Senior Network Engineer and take ownership of designing, deploying, and maintaining high-performance network infrastructure across multiple enterprise sites. This role offers the opportunity to work hands-on with industry-leading Fortinet and Cisco technologies while shaping the security and scalability of business-critical systems.

You will collaborate with cross-functional IT teams to support and optimize global voice, cloud, and data center initiatives. Your aim will be to ensure the availability, resilience, and performance of network operations while proactively identifying improvements in security and efficiency. Expect to lead architectural upgrades, contribute to strategic planning, and serve as a technical authority for complex network issues.

In this role, your expertise will directly impact operational success, enabling fast and secure communications that support advanced automation, robotics, and digital logistics platforms.

Job Responsibilities:

• Design, implement, and maintain LAN, WAN, and security infrastructure across enterprise environments
• Configure and optimize Fortinet technologies, including FortiGate, FortiManager, FortiAnalyzer, and VPN solutions
• Administer and troubleshoot Cisco switching platforms (Catalyst/Nexus), ensuring high performance and availability
• Lead network upgrades, migrations, and architecture enhancements
• Enforce network security standards, policies, and best practices
• Provide Level 3 support and resolve escalated network incidents
• Conduct capacity planning, risk assessments, and performance monitoring
• Collaborate with IT teams on cloud, voice, and data center projects
• Maintain technical documentation for compliance and operational use
• Evaluate and recommend emerging network technologies

Qualifications Needed:

• 5–10 years of experience in enterprise network engineering, with at least 2–3 years in a senior-level role
• Proven experience working in end-user environments.
• Technical expertise in:
• Fortinet stack: FortiGate, FortiManager, FortiAnalyzer, FortiAuthenticator
• Cisco switching platforms: Catalyst, Nexus (VLANs, STP, QoS, EtherChannel)
• Network routing protocols: OSPF, BGP, EIGRP
• VPN configurations: IPSec, SSL VPN, site-to-site, remote access
• Network segmentation, firewall policies, HA setups, and troubleshooting security events
• Infrastructure and system administration practices
• Familiarity with monitoring tools (SolarWinds, PRTG, syslog, SNMP)
• Scripting/automation knowledge (Python, Ansible) is a plus
• Strong documentation and communication skills
• Fluent in English. Dutch language skills are a plus.
• Certifications preferred: Fortinet NSE4/NSE5, Cisco CCNP/CCIE, ITIL Foundation

Additional Details:

• Location: Houten, Netherlands
• Hybrid role: 3 days/week in the office
• Some travel required
• No on-call duty, but will follow FORTNA's shift schedule.

How to Apply: Click the 'Apply' button or connect directly with Florencia Senia at florenciasenia@fortna.com.