Network Security Engineer, Senior | Top Secret w/SCI eligibility with Security Clearance

AMERICAN SYSTEMS, a 100% employee

• owned federal contractor, 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.

You'll work independently on assigned priorities while partnering closely with technical teams, customers, and vendors to solve operational challenges.

• 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 help ensure reliable 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.
• Help 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 overall security posture of the environment.

• Active Top Secret clearance w/SCI eligibility and ability to obtain SAP access
• U.S. citizenship, required to obtain and maintain a U.S.

• Bachelor's degree in Information Technology, Cybersecurity, or a related field.

• 5-7 years of experience supporting enterprise networks in DoD, federal, or similarly regulated environments
• Current CCNA certification
• Current DoD 8140 IAT Level III certification, such as CASP+ CE, CCNP Security, CISA, CISSP or Associate, GCED, GCIH, CCSP, or CISM
• Hands-on experience configuring and maintaining Cisco network infrastructure
• Experience supporting or implementing the Risk Management Framework (RMF) in accordance with DoD and Department of the Navy cybersecurity requirements
• Familiarity with vulnerability management, patch compliance, and information assurance controls
• Experience supporting Solaris, Linux, or UNIX-based systems
• Experience installing or 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 who have limited Solaris or systems engineering experience but strong network security fundamentals and a willingness to learn may be considered.
• This role offers the opportunity to build experience across network engineering, systems administration, and cybersecurity.

Note: This position supports a classified DoD environment.

• USD $170,000/Yr.

AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance.

EEO Statement EEO Race/Sex/Disability Status/Veteran Status