Network Engineer III

Responsibilities

As a Network Engineer III, you will provide expert leadership in designing, implementing, and managing sophisticated network systems and communications with special emphasis on Top Secret classification enclaves. You will architect secure network infrastructures that meet the highest security standards while enabling mission‑critical operations. Your expertise will ensure the reliability, security, and performance of network systems that enable users to access highly sensitive data securely across complex classified network infrastructure.

• Design and implement advanced network systems and communications solutions.
• Create and maintain comprehensive network security strategies for classified environments.
• Gather complex user network requirements utilizing multiple methodologies while ensuring compliance with security controls.
• Develop and maintain extensive technical documentation, system requirements documents, and security requirements for classified networks.
• Lead troubleshooting and resolution efforts for sophisticated network issues involving various protocols, topologies, and networking hardware in classified domains.
• Design, deploy, test, certify, and patch critical network components including switches, firewalls, and load balancers in classified environments.
• Address complex interoperability issues for all features, components, and application dependencies across classification boundaries.
• Lead incident response for critical network issues within designated resolution timelines.

• US Citizenship is required
• Bachelor's degree OR Master's degree with 8 years of experience OR Associate degree with 11 years of experience OR High School diploma with 14 years of experience.
• Minimum of 8 years of experience in network engineering/administration.
• Active Top Secret (TS) clearance with eligibility for Sensitive Compartmented Information (SCI) and ability to obtain a Counterintelligence (CI) Polygraph.
• Comprehensive understanding of multi‑enclave network environments.
• Demonstrated experience designing and implementing secure networks in classified government environments.
• Proficiency with:
• Enterprise network hardware (Cisco, Sonic Wall) configuration in classified environments
• Advanced implementation of network protocols (TCP/IP, DNS, DHCP, HTTP/S) with security hardening
• Advanced load balancer implementation and configuration for classified applications
• Secure VPN technologies and encrypted tunneling for classified data transmission
• Advanced network security principles and practices including zero‑trust architecture
• Enterprise network monitoring, analytics, and troubleshooting tools for classified networks
• Network performance optimization while maintaining stringent security controls
• Network segmentation and isolation techniques for classified domains
• Advanced knowledge of IDS/IPS deployment and management
• May require flexible scheduling to support critical operations in Top Secret environments.
• Must be able to respond to critical network incidents within designated resolution timelines (Critical: 8 hours, High: 24 hours, Medium: 48 hours, Low: 72 hours)

• Active TS/SCI with CI Polygraph.
• Relevant network certifications (CCNP, CCIE, or equivalent) preferred.
• Security certifications (CISSP, Security+) preferred.
• Experience designing and implementing networks within SCIFs.
• Experience with Nutanix.
• Background in security accreditation for classified networks.
• Experience with advanced Cross‑Domain Solutions.
• Expertise in network traffic analysis within classified environments.
• Prior work with specialized networking requirements for intelligence community operations.

Noblis (http://(Use the "Apply for this Job" box below).) and our wholly owned subsidiaries, Noblis ESI , and Noblis MSD tackle the nation's toughest problems and apply advanced solutions to our clients' most critical missions. We bring the best of scientific thought, management, and engineering expertise together in an environment of independence and objectivity to deliver enduring impact on federal missions. Noblis works with a wide range of government clients in the defense, intelligence and federal civil…