Network Engineer; Cisco, Linux, VPNs & Scripting

We are seeking a proactive and detail-oriented Network Engineer to join our infrastructure team. In this role, you will be responsible for configuring, maintaining, and securing our core enterprise networking infrastructure, virtual environments, Linux systems, and secure remote-access connections.

You will work closely with our engineering team to maintain high system availability, implement Linux-based firewall rules, build and maintain secure VPN tunnels, and automate routine operational tasks using languages like Python and Bash. This position is ideal for a growing engineer looking to expand their technical capabilities in network security, virtualization, automated cloud orchestration, and advanced encryption frameworks.

• Core Network Operations: Configure, maintain, and troubleshoot enterprise network hardware, including Cisco routers, switches, and firewalls.
• VPN & Secure Connectivity: Design, deploy, and support site-to-site and remote-access VPNs (IPsec, OpenVPN, Wire Guard) to ensure encrypted, secure communications.
• Linux Security & Administration: Configure and manage Linux firewalls (iptables, nftables, ufw) alongside general Linux server administration (DNS, DHCP, SSH, Syslog).
• Network Automation & Scripting: Write and maintain basic programs/scripts using Python, Bash, or similar languages to automate system backups, log parsing, and routine network monitoring tasks.
• Virtualization Support: Support network configurations and virtual bridging across Virtual Machines (VMs) and hypervisors (e.g., VMware ESXi, KVM, Proxmox).
• Troubleshooting & Remediation: Diagnose and resolve Layer 1 through Layer 7 network incidents, packet loss, routing failures, and performance bottlenecks using traffic analysis tools.
• Documentation & Compliance: Maintain precise topology diagrams, IP address management (IPAM), and operational runbooks.

• 2–5 years of hands-on experience in network administration or network engineering.
• Hands-on experience with Linux Systems Administration (Ubuntu, RHEL, CentOS, or Rocky Linux) and command-line management.
• Solid experience configuring Linux Firewalls (iptables, nftables, ufw) and system security controls.
• Practical experience configuring and troubleshooting VPN technologies (IPsec, OpenVPN, Wire Guard).
• Proficiency in basic programming/scripting using Python, Bash, or similar languages for task automation.
• Practical experience managing networking within Virtual Machine environments (vSwitches, virtual bridges, hypervisors).
• Core networking protocol expertise: TCP/IP, Subnetting, DNS, DHCP, SNMP, and HTTP/S.

• Infrastructure Automation & Orchestration: Experience with automation and configuration management tools like Ansible, as well as cloud orchestration frameworks (e.g., Terraform, Cloud Formation).
• Container Networking: Familiarity with containers and container networking concepts (e.g., Docker, Kubernetes CNI plugins).
• Network Encryption
  
  Experience:
  
  Familiarity with network encryption protocols and security products (e.g., TLS/SSL, MACsec, hardware encryptors).
• Industry certifications such as CCNA, CompTIA Security+, or Linux Professional Institute (LPIC-1 / RHCSA).
• Experience with network monitoring tools (e.g., Wireshark, Nagios, Zabbix, PRTG).

End Line Systems is a startup focused on specialized engineering for complex missions across network engineering, systems engineering, software development, and cybersecurity. We are seeking engineers who enjoy tackling multi-disciplinary technical challenges and delivering reliable, field-ready solutions.

• Citizenship: Position requires United States (US) Citizenship only. Applicants selected will be subject to a background investigation and must meet eligibility requirements for access to classified information.
• Security Clearance: An active Top Secret (TS) security clearance is strongly preferred.

End Line Systems provides reasonable accommodations to qualified individuals with disabilities. If you need assistance or an accommodation during the application process, please contact us at

End Line Systems is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or protected veteran status.