Network Security Engineer

SES Corporation

Network Security Engineer overseeing Cisco network infrastructure while managing security and compliance for federal requirements. Responsible for performance, updates, and incident resolution.

Posted 5/21/2026full-timeAlexandria • Virginia • 🇺🇸 United StatesMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

AWSAzureCloudFirewallsSwitching

About the role

Key responsibilities & impact

Install, configure, and maintain network infrastructure components, including Cisco routers, switches, wireless systems, and firewalls.
Administer network management and monitoring platforms, including PathSolutions and Cisco DNA Center, and maintain operations continuity during transition from Cisco Prime (near-term end of support).
Manage Palo Alto firewall platforms and services, including PAN-OS, VPN, Prisma Access, and GlobalProtect, ensuring lifecycle support through end-of-support timelines.
Perform structured cabling installation and management for copper and fiber infrastructure across sites and colocation facilities.
Monitor and optimize network performance across enterprise, MPLS, and cloud-connected environments to ensure efficient resource utilization and minimal downtime.
Diagnose and resolve network issues, including routing, switching, connectivity, latency, and security-related incidents.
Implement and maintain secure network configurations, including patching, updates, and compliance hardening across on-premises and cloud network environments.
Support hybrid and multi-cloud connectivity, including Azure ExpressRoute (dual-region connectivity), AWS Direct Connect, and site-to-site redundancy architectures.
Operate and maintain wide area network (WAN) infrastructure, including dual MPLS circuits per site and high-speed interconnection (e.g., 10G point-to-point links between colocation facilities).
Support Trusted Internet Connections (TIC) and managed security services, including Lumen MTIPS and Cloudflare-based TIC 3.0 alignment.
Administer segmented network environments supporting operational systems (e.g., OCSM networks, building systems, access control such as Lenel panels), including associated firewalls and supporting infrastructure.
Support telecommunications and transition initiatives, including EIS Task Orders (TO) and migration from legacy voice/video systems to Microsoft Teams-based solutions.
Integrate network telemetry and security monitoring tools, including platforms such as Corelight, Garland, and related SOC enablement technologies.
Ensure compliance with federal policies and directives, including OMB M-21-31 requirements for event logging and network visibility.
Maintain and update network documentation, including configurations, standard operating procedures, diagrams, and configuration management artifacts.
Collaborate with cross-functional IT teams to support system integration, application delivery, and enterprise architecture alignment.
Respond to network alerts, incidents, and service disruptions, ensuring timely resolution and escalation as required.
Provide technical support for existing and emerging technologies, including planning and execution of network-related projects and initiatives.
Conduct research and provide analysis on emerging networking technologies and their applicability to the organization.
Perform installation, replacement, and lifecycle management of network hardware and associated components.

Requirements

What you’ll need

*Bachelor’s degree in computer science, Information Systems, Engineering, or related field.*
*Cisco Certified Network Professional (CCNP) certification and 4 years of relevant IT experience required; candidates without CCNP certification must have 6 years of relevant IT experience.*
Ability to obtain a *Public trust security clearance*
*Located in the DMV area*

Benefits

Comp & perks

**SES provides a competitive salary and the following benefits:**
- Medical
- Dental
- Vision
- AD&D
- STD
- LTD
- Company paid Life Insurance
- 401k with employer contribution
- Paid Time Off
- Pet Insurance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

network infrastructureCisco routersCisco switchesfirewallsstructured cablingnetwork performance optimizationnetwork issue diagnosissecure network configurationshybrid cloud connectivityWAN infrastructure

Soft Skills

collaborationtechnical supportproblem-solvingcommunicationproject management

Certifications

Cisco Certified Network Professional (CCNP)Public trust security clearance