Network Security Engineer, Senior | Top Secret w/SCI eligibility
American Systems · Ridge Crest, CA, US
About this role
## Overview AMERICAN SYSTEMS (100% employee-owned) is seeking a **Senior Network Security Engineer** to help operate and secure **classified network infrastructure** for a Department of Defense customer at **China Lake, CA**. In this role, you’ll combine hands-on **Cisco network engineering** and **cybersecurity** skills to keep mission systems **secure, reliable, and available**. ## Responsibilities As a Senior Network Security Engineer, you will: - Configure, administer, and troubleshoot **Cisco routers and switches** supporting classified networks - Install, maintain, and optimize **enterprise LAN/WAN** infrastructure - Monitor **network health**, system logs, backups, and scheduled jobs to support day-to-day operations - Support remote users with equipment setup and **Layer 2/Layer 3 connectivity** troubleshooting - Diagnose and resolve **Cisco infrastructure, VPN, and VMware-related** connectivity issues - Perform authorized **software installations, upgrades, license management, and security patching** - Manage **user accounts and access controls** in alignment with cybersecurity best practices and customer requirements - Support **incident response**, **vulnerability remediation**, and identification of potential security risks - Maintain **network procedures**, technical documentation, and operational standards - Collaborate with internal teams and **vendor representatives** to resolve technical and operational issues - Work with minimal supervision while contributing to the environment’s overall security posture ## Qualifications - **Active Top Secret clearance with SCI eligibility** and ability to obtain **SAP access** - **U.S. citizenship** required to obtain and maintain a U.S. security clearance - Bachelor’s degree in **Information Technology, Cybersecurity,** or related field (additional relevant experience may be considered) - **5–7 years** supporting enterprise networks in DoD, federal, or similarly regulated environments - **Current CCNA** certification - **Current DoD 8140 IAT Level III** certification (e.g., **CASP+**, **CE**, **CCNP Security**, **CISA**, **CISSP**, Associate, **GCED**, **GCIH**, **CCSP**, **CISM**) - Hands-on experience configuring and maintaining **Cisco network infrastructure** - Experience supporting/implementing **Risk Management Framework (RMF)** in accordance with DoD and Department of the Navy requirements - Familiarity with **vulnerability management**, **patch compliance**, and information assurance controls - Experience supporting **Solaris, Linux, or UNIX-based** systems - Experience installing/configuring **intrusion detection systems, firewalls,** or other perimeter defense technologies - Experience supporting **continuity of operations planning**, failover testing, or system-availability documentation - Experience integrating network infrastructure with broader enterprise systems ## Growth Opportunity Candidates with limited Solaris/systems engineering experience but strong network security fundamentals and willingness to learn may be considered. This role provides opportunities to build experience across **network engineering, systems administration, and cybersecurity**. ## Security / Clearance Note This position supports a **classified DoD environment**. Candidates must be able to meet all security clearance and customer access requirements. ## Pay & Benefits - **Salary range:** **$150,000.00/yr – $170,000/yr** (actual compensation determined based on factors permitted by law) -
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