Network Engineer - Sustainment Engineer

About the role

We are seeking an experienced Senior Network Engineer to support the sustainment, maintenance, troubleshooting, and operational readiness of secure classified communications environments. This role requires a hands-on technical professional with expertise across networking, cybersecurity, and systems administration who can support mission-critical infrastructure within highly secure environments.

Responsibilities

• Provide ongoing sustainment, maintenance, troubleshooting, and optimization of secure enterprise network environments.
• Support virtualized infrastructure and complex multi-platform network architectures.
• Deploy, configure, test, and maintain network and security appliances.
• Install, configure, and support routers, switches, firewalls, VPN gateways, wireless infrastructure, and related network technologies.
• Perform configuration management and ensure operational readiness of network systems.
• Investigate and resolve network, system, and security incidents in classified environments.
• Conduct engineering evaluations, technology assessments, and performance analysis.
• Support Public Key Infrastructure (PKI), including certificate deployment, installation, renewal, and lifecycle management.
• Implement and manage firewall rules, access control lists (ACLs), and network segmentation strategies.
• Implement and support 802.1X authentication and network access control solutions.
• Utilize network monitoring, management, and security tools to maintain system performance and compliance.
• Implement system and network hardening procedures in accordance with DoD security standards and best practices.
• Develop technical documentation, reports, and presentations for stakeholders.
• Participate in on-call support and incident response activities as required.

Requirements

• Active DoD Secret Clearance (minimum).
• Minimum 8 years of Network Engineering experience supporting Cisco and/or Juniper environments.
• Minimum 2 years of experience supporting DoD enterprise environments.
• Strong understanding of: Enterprise network architecture, Network and security appliances, Application services, Virtualized environments, Network management and monitoring platforms, Network troubleshooting methodologies, Performance optimization.
• Proven experience configuring, monitoring, maintaining, and troubleshooting network infrastructure.
• Strong knowledge of switching technologies and network operations.
• Experience with: Cisco routing and switching, Cisco Identity Services Engine (ISE), Juniper networking solutions, Palo Alto firewalls, Aruba networking technologies.
• Experience supporting: Active Directory, Domain Controllers, DNS, DHCP, PKI integration, VMware vSphere environments.
• Ability to work effectively with both technical and non-technical stakeholders.

Preferred Qualifications

• Experience supporting secure classified communications environments.
• Experience with: F5 Load Balancers, Wi-Fi technologies including 802.11ac and 802.11ax, PKI and certificate-based authentication solutions, Enterprise network access control implementations, Familiarity with virtualization technologies and systems administration.
• Experience supporting U.S. Navy, Marine Corps, or broader Department of Defense missions.
• Active DoD 8570/8140 compliant certification such as: Security+, CCNA, CCNP, CISSP.
• Familiarity with virtualization technologies and systems administration.
• Experience supporting U.S. Navy, Marine Corps, or broader Department of Defense missions.

Top Technical Skills

• Cisco Networking
• Cisco ISE
• Juniper Networks
• Palo Alto Firewalls
• Aruba Networks
• PKI Infrastructure
• Active Directory
• VMware vSphere
• Routing & Switching
• Firewall Administration
• Network Monitoring & Security Tools
• Vulnerability Management
• Windows Server Administration