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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Network Security Engineer (Network Engineering, Associate) - **Company:** MIL Corporation - **Location:** Washington, DC, United States - **Experience:** Expert - **Salary:** $100,847.0 - $151,271.0 - **Contract:** Permanent contract - **Skills:** IEEE 802.1X, Access Network, Application Firewall, Network Analysis, Cloud Engineering, CompTIA Security+, Cyber Security, Dynamic Host Configuration Protocol, Domain Name System (DNS), Multi-Factor Authentication, Monitoring of Systems, Networking Hardware, Internetworking, Virtual Private Networks (VPN), Information Systems Security Architecture Professional, Network Security, Network Architecture, Network Monitoring, Routing, Network Segmentation, Network Service, Remote Access Technology, Zero Trust Network Access, Security Information and Event Management, Virtual Local Area Networks, Software Vulnerability Management, Data Logging, Computer Networking Systems, Identity Services Engine, Network Access Control, Infrastructure Automation Frameworks, Information Technology, CIS Benchmarks, Open Network Automation Platform, Cisco, Vulnerability Analysis - **Published:** August 4, 2026 - **Apply:** https://diversityjobs.com/main/sendform/8/8/28176/1/17809877?backUrl=%2Fcareer%2F17809877%2FSenior-Network-Security-Engineer-Network-Engineering-Associate-D-C-Washington ## About the Role * Minimum 8 years of experience supporting enterprise network environments. * Minimum 5 years of hands-on Cisco networking experience. * Strong experience with: + Cisco routing and switching + Network segmentation and micro-segmentation + VLANs, DNS, DHCP, VPN technologies + 802.1X Network Access Control + Firewall administration and network security + Network monitoring and logging solutions + Vulnerability management and remediation + Incident response and forensic support * Experience implementing NIST 800-53 security controls. * Experience supporting or implementing Zero Trust Architecture initiatives. * Strong understanding of network hardening, security baselines, and secure configuration management. * Excellent troubleshooting, analytical, and documentation skills. Desired Qualifications * Experience supporting Federal Government environments. * Experience with Cisco Identity Services Engine (ISE). * Experience integrating network infrastructure with SIEM platforms. * Experience supporting cloud-connected network environments. * Knowledge of Risk Management Framework (RMF) processes. * Experience with network automation and infrastructure-as-code tools. * One or more of the following certifications are highly desired: + Cisco Certified Network Professional (CCNP Enterprise) + Cisco Certified Internetwork Expert (CCIE) + CompTIA Security+ + Cisco CyberOps Professional + Certified Information Systems Security Professional (CISSP) + GIAC Security Certifications (GIAC, GSEC, GCIA, or similar) Education Bachelor's degree in Information Technology, Computer Science, Engineering, or related field, or equivalent experience. Clearance Ability to obtain a Top Secret clearance ## Description The MIL Corporation is seeking a Senior Network Security Engineer (Network Engineering, Associate) to support and enhance a large Cisco-based enterprise network environment. This position is responsible for designing, implementing, securing, and maintaining network infrastructure while advancing Zero Trust Architecture initiatives and ensuring compliance with federal cybersecurity standards. The successful candidate will serve as a technical leader responsible for network engineering, security architecture, vulnerability remediation, incident response support, and operational excellence across core, distribution, access, and perimeter network environments. This position currently requires an on-site schedule. Schedule is subject to change based on company/contract requirements. This position is currently unfunded and is being posted in anticipation of a future contract award and funding approval. We are proactively identifying and engaging with qualified candidates. While candidates may be contacted for pre-screening, any hiring decisions will be contingent upon funding availability and final program requirements or client approval. Responsibilities Network Engineering & Operations * Design, implement, and maintain enterprise network infrastructure including core, distribution, access, and edge network environments. * Configure, manage, and troubleshoot Cisco routing and switching technologies. * Administer and support network services including VLANs, DNS, DHCP, VPNs, and network access controls. * Perform root cause analysis and corrective actions for network outages, performance issues, and security incidents. * Develop and maintain network architecture documentation, diagrams, and configuration standards. Network Security & Zero Trust Architecture * Implement and maintain network security controls aligned with NIST SP 800-53 and Zero Trust Architecture principles (NIST SP 800-207). * Design and maintain network segmentation and micro-segmentation strategies to protect critical assets and limit lateral movement. * Implement least-privilege and identity-based network access controls. * Manage and support 802.1X network access control solutions. * Harden network devices following Cisco Secure Configuration Guides and industry best practices. * Secure perimeter environments through firewall policy management, ingress/egress filtering, and multi-factor authentication controls. Monitoring, Compliance & Incident Response * Support continuous monitoring of network infrastructure and security events. * Integrate network devices with enterprise monitoring, logging, and SIEM platforms. * Conduct vulnerability assessments and coordinate remediation activities. * Support incident response activities including forensic data collection, containment actions, and network analysis. * Ensure compliance with federal cybersecurity frameworks and organizational security requirements. Change Management & Documentation * Participate in formal change management processes and security impact assessments. * Maintain accurate network configurations, hardware inventories, and baseline documentation. * Develop and maintain Standard Operating Procedures (SOPs). * Ensure operational documentation remains current and audit-ready. Collaboration & Leadership * Serve as a senior technical resource for complex networking and security issues. * Collaborate with cloud engineering, Microsoft infrastructure, cybersecurity, and service desk teams. * Provide technical guidance and mentoring to junior staff and operational teams., * 2017, 2020 - 2025 Top Workplace Award, South Carolina (Greenville Business Magazine, Columbia Business Monthly, and Charleston Business Magazine) * 2025 Corporate Partnership Award, Association of Fundraising Professionals, Maryland Chapter * 2025 Moxie Award, GovCon Category * 2024 Patriot Award, Employer Support of the Guard and Reserve (ESGR), Department of Defense * 2022 Freedom Award, Employer Support of the Guard and Reserve (ESGR), Department of Defense * 2018, Above & Beyond Award, Employer Support of the Guard and Reserve (ESGR), Department of Defense If your goal is to help the federal government deploy leading technologies, improve financial management, or defend the nation in cyberspace, MIL welcomes you. 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