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# TSSCI Senior Network Engineer

- **Company:** Insight Global
- **Location:** Arlington, MD, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Xacta, Microsoft Windows, VoIP, Cisco Unified Communications Manager, Computer Networks, System Configuration, Dynamic Host Configuration Protocol, Linux, Domain Name System (DNS), Hyper-V, IP Addressing, Intrusion Detection Systems, Virtual Private Networks (VPN), Network Security, Windows Servers, Network Planning and Design, Network Monitoring, Routing, Network Segmentation, Performance Tuning, Virtual Local Area Networks, Software Vulnerability Management, In-Plane Switching (IPS), Firewalls (Computer Science), Information Technology, Cisco, Plan of Action and Milestones
- **Published:** November 10, 2026
- **Apply:** https://www.adzuna.com/details/5958186070

## About the Role

Job Description We are seeking a TS/SCI-cleared Senior Network Engineer to own and support a secure Cisco network environment, including troubleshooting, maintenance, security, and unified communications. The role also supports FISMA/RMF compliance, NIST 800-53 controls, POA&M remediation, and Xacta 360, making federal cybersecurity compliance experience highly preferred. Skills and Requirements - Bachelor's degree in information technology or a related technical field, plus strong technical documentation, communication, organization, and customer-engagement skills.

 - Seven or more years of hands-on enterprise network/security administration and engineering experience, including network design, installation, operations, maintenance, troubleshooting, security, and performance optimization.
 - Three or more years of federal FISMA/RMF security-control validation and compliance experience, including NIST SP 800-53 controls, SSPs, POA&Ms, continuous monitoring, technical control evidence, vulnerability/configuration findings, remediation, annual assessment readiness, and hands-on Xacta/Xacta 360 experience.
 - Current Cisco Certified Network Associate (CCNA) or Cisco Certified Network Professional (CCNP) certification. CCNP is strongly preferred.
 - Must have experience administering Cisco CUCM/Call Manager and enterprise VoIP technologies, including SIP, QoS, voice VLANs, and voice gateways.
 - Demonstrated ability to independently own enterprise network operations and complex Cisco routing, switching, VLAN, firewall, VPN, DNS/DHCP, IP addressing, network monitoring, and connectivity troubleshooting in a production environment.
 - Hands-on experience configuring, administering, and maintaining firewalls, VPNs, IDS/IPS, network segmentation, ACLs, secure remote-access solutions, network security devices, and vulnerability remediation.
 - Hands-on experience with Windows operating systems, Windows Server/Hyper-V, and Linux, with the ability to support network dependencies across virtualized and identity/access environments. We are a company committed to creating diverse and inclusive environments where people can bring their full, authentic selves to work every day. We are an equal employment opportunity/affirmative action employer that believes everyone matters. Qualified candidates will receive consideration for employment without regard to race, color, ethnicity, religion, sex (including pregnancy), sexual orientation, gender identity and expression, marital status, national origin, ancestry, genetic factors, age, disability, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable laws, regulations, and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or the recruiting process