Lead Network Security Engineer - DoD Cisco & RMF Specialist

American Systems; California; On-site; USD 160,000 - 180,000; Full time

Benefits offered by this job

healthcare benefits

paid leave

retirement plans

insurance programs

education and training assistance

Job summary

AMERICAN SYSTEMS in the United States is seeking a Lead Network Security Engineer to secure classified DoD network infrastructure at China Lake, CA. You will combine Cisco network engineering and cybersecurity to keep mission systems secure and available.

You will work with minimal supervision, configure Cisco routers and switches, manage RMF processes, and support incident response and vulnerability remediation across enterprise networks. U.S.

Qualifications

• Active Top Secret clearance w/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 a related field; additional relevant experience may be considered in place of a degree.
• 8-10 years of experience supporting enterprise networks in DoD, federal, or similarly regulated environments.
• CCNA certification (or ability to successfully obtain within 6 months of hire).
• 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 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.

Responsibilities

• 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.

Skills

Cisco networking

Cybersecurity

RMF knowledge

Solaris/Unix

Intrusion detection

Firewalls

DoD clearance

Education

Bachelor's degree in IT or related field

Tools

CCNA certification

DoD 8140 IAT Level III

Job description

AMERICAN SYSTEMS in the United States is seeking a Lead Network Security Engineer to secure classified DoD network infrastructure at China Lake, CA. You will combine Cisco network engineering and cybersecurity to keep mission systems secure and available.

You will work with minimal supervision, configure Cisco routers and switches, manage RMF processes, and support incident response and vulnerability remediation across enterprise networks. U.S.