Senior Network Engineer
Employer not yet confirmed · Viersen, Nordrhein-Westfalen, Germany · onsite
Job Title: Senior Network Engineer
Location: [Remote / Hybrid]
Job Type: Full-time
Department: IT / Infrastructure / Network Operations
Reports To: IT Director
About the Role
We are seeking a Senior network engineer to design, implement, secure, and support enterprise network infrastructure across LAN/WAN/WiFi, data centers, and cloud connectivity. This role requires deep technical expertise, strong troubleshooting skills, and the ability to lead network initiatives from planning through execution.
Key Responsibilities
- Design, implement, and maintain enterprise network infrastructure (LAN/WAN/WLAN).
- Manage and optimize routing and switching environments (SDWAN, SDA, BGP, OSPF, EIGRP, VLANs, STP, HSRP/VRRP).
- Configure and support firewalls, VPNs, and network security controls.
- Lead network upgrades, migrations, and major infrastructure projects.
- Support and troubleshoot network performance issues and outages (root cause analysis).
- Monitor network health using tools like SolarWinds / ThousandEyes (or similar).
- Maintain network documentation: diagrams, IP schema, standards, and runbooks.
- Work with service providers for circuit turn-ups, troubleshooting, and escalations.
- Ensure high availability, redundancy, and disaster recovery readiness.
- Mentor junior engineers and provide technical guidance.
- Participate in on-call rotation and support after-hours maintenance activities.
Cloud Networking (AWS/Azure/OCI)
- Design and support cloud network architecture, including:- AWS VPC / Transit Gateway / Route Tables / NACLs / Security Groups
- Azure VNet / VNet Peering / UDR / NSGs / Cloud Firewall
- Implement secure hybrid connectivity:- IPsec site-to-site VPN
- AWS Direct Connect / Azure ExpressRoute
- Implement cloud segmentation and secure routing patterns for CUI environments.
- Support cloud security integrations:- Centralized logging/monitoring
- Network traffic visibility and alerting
- Partner with cloud engineering teams to ensure compliant connectivity for workloads handling CUI
Required Qualifications
- Bachelor’s degree in IT/Computer Science or equivalent work experience.
- Hands-on enterprise network engineering experience.
- Strong knowledge of:- Routing and switching (Cisco)
- TCP/IP, subnetting, DNS, DHCP, InfoBlox
- WAN technologies (DMVPN, SD-WAN, DIA, broadband)
- Wireless networking (Cisco/Meraki) with ISE Infra
- Experience with:- Firewalls (Palo Alto / Cisco ASA/FTD)
- VPN (site-to-site, remote access)
- Network segmentation and security best practices
- Strong troubleshooting skills using packet capture tools (Wireshark/tcpdump).
- Excellent communication and stakeholder management skills.
Preferred Qualifications
- Experience with SD-WAN (Viptela, etc.)
- Cloud networking experience: AWS / Azure / OCI- VPC/VNet design, VPN, Direct Connect/ExpressRoute
- Automation experience (Python, Ansible, Terraform, API-based networking).
- Experience with NAC solutions (Cisco ISE, ClearPass).
- Knowledge of compliance/security frameworks (NIST, CMMC, ISO 27001).
- Certifications preferred:- CCNP / CCIE (Enterprise/Security)
- PCNSE / NSE
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