> Markdown version of [/jobs/ext/4179996-senior-network-engineer](https://www.wearedevelopers.com/jobs/ext/4179996-senior-network-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Network Engineer

- **Company:** ECS Limited
- **Location:** Quantico, VA, United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Active Directory, Application Layers, Backup Devices, Cloud Computing, Software Documentation, CompTIA Security+, Cyber Security, Computer Networks, Databases, Network Address Translation, Domain Name System (DNS), Ethernet, Firmware, Monitoring of Systems, Networking Hardware, Subnetting, Virtual Private Networks (VPN), Junos, Windows Servers, Routing, Network Segmentation, Network Service, Public Key Infrastructure, Windows PowerShell, TCP/IP, Virtual Local Area Networks, Virtualization Technology, Software Vulnerability Management, Data Logging, Scripting, Firewalls (Computer Science), Information Technology, Nessus, Data Management, Firewall Services Module, Veeam, Splunk
- **Published:** October 2, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9210486/senior-network-engineer

## About the Role

* 5+ years of relevant experience in network engineering, infrastructure engineering, or a related discipline.
 * Bachelor's degree in IT, Computer Science, Engineering, Cybersecurity, or related field, or equivalent education, certifications, and experience.
 * Strong enterprise networking knowledge including TCP/IP, subnetting, switching, routing, VLANs, ACLs, NAT, VPNs, DNS, and network segmentation.
 * Strong understanding of physical network infrastructure including Ethernet, copper/fiber, optics/transceivers, and link troubleshooting.
 * Working knowledge of Windows Server, Active Directory, Group Policy, virtualization, enterprise storage, backup/recovery, and infrastructure monitoring.
 * Strong cross-platform troubleshooting skills and the ability to independently research, diagnose, and resolve complex technical problems.
 * Working knowledge of cybersecurity hardening principles and secure enterprise environments.
 * U.S. citizenship and ability to obtain and maintain a Secret security clearance.
 * Must possess or obtain an applicable DoD 8140 certification, such as CompTIA Security+ CE, within 90 days of employment.
 * Ability to work primarily on-site at MCB Quantico., * VMware vSphere, ESXi, and vCenter
 * Cisco enterprise or Nexus switching
 * Juniper SRX/vSRX firewalls and Junos
 * Enterprise SAN/iSCSI storage and Veeam
 * Splunk or comparable centralized logging platforms
 * RADIUS/MFA and PKI/certificate-based authentication
 * DISA STIGs, RMF/ATO, and ACAS/Nessus
 * Cloud infrastructure architecture, design, implementation, or migration
 * PowerShell, scripting, or infrastructure automation

## Description

This is a hands-on position responsible for the design, implementation, maintenance, and troubleshooting of network, server, virtualization, storage, and supporting infrastructure.

The role has a strong emphasis on networking, switching, firewalls, DNS, and infrastructure troubleshooting and works closely with the technical team lead, development, database, and cybersecurity personnel.

Primary Responsibilities

 * Design, administer, maintain, and troubleshoot enterprise network, server, virtualization, storage, firewall, and supporting infrastructure.
 * Manage switching, routing, VLANs, network segmentation, DNS, firewall policies, NAT, VPNs, and related network services.
 * Support Windows Server infrastructure and associated enterprise services.
 * Diagnose complex infrastructure and connectivity issues across physical, network, virtualization, operating system, and application layers.
 * Maintain virtualization, storage, backup/recovery, logging, monitoring, and authentication infrastructure.
 * Perform hands-on datacenter work including rack/stack, copper and fiber cabling, optics/transceivers, hardware replacement, firmware upgrades, and physical-layer troubleshooting.
 * Support infrastructure upgrades, lifecycle planning, cybersecurity requirements, and vulnerability remediation.
 * Maintain and contribute to technical documentation, diagrams, SOPs, and annual system documentation reviews.