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# Network Engineer *Active Top Secret Required*

- **Company:** Tenacity Solutions Inc
- **Location:** Washington, DC, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Access Control List, Amazon Web Services, Microsoft Azure, Disaster Recovery, Virtual Private Networks (VPN), Network Architecture, Network Diagrams, Network Connections, Network Monitoring, Network Protocols, Citrix Systems, Wireshark, Virtual Local Area Networks, Wide Area Networks, Wireless Access Point, Network Routers, Diagnostic Tools, Computer Network Operations, Information Technology, SolarWinds (Software), Firewall Services Module, Cisco
- **Published:** November 13, 2026
- **Apply:** https://www.thejobnetwork.com/job/f8b55422-a5f2-4a61-80c3-4ae03ca20626/network-engineer-active-top-secret-required

## About the Role

* Minimum 5 years of experience supporting network operations in a federal, DoD, or Intelligence Community environment.
 * Demonstrated expertise with Cisco enterprise network devices and architectures.
 * Hands-on experience supporting enterprise firewall technologies in a secure or regulated environment.
 * Strong understanding of LAN/WAN design, network protocols, VLANs, VPNs, and Quality of Service (QoS).
 * Experience applying DISA STIGs and NIST security frameworks.
 * Proficiency with network monitoring and diagnostic tools (e.g., SolarWinds, Wireshark).
 * Strong documentation, communication, and analytical skills.

Desired

 * Bachelor's degree in Information Technology, Computer Science, Network Engineering, or related field.
 * Industry certifications such as CCNP, CCNA, Security+, or Network+.
 * Experience supporting classified or Intelligence Community networks.
 * Familiarity with secure VTC or unified communications environments.
 * Exposure to Citrix, hybrid AWS/Azure environments, or Treasury systems.

## Description

Seeking an experienced Network Engineer to support the U.S. Department of the Treasury's mission-critical classified IT system that enables Treasury's national security, intelligence, and counter-threat finance missions.

The selected candidate will operate within a Secure Compartmented Information Facility (SCIF) and be responsible for ensuring the reliability, security, and performance of Treasury's classified network infrastructure supporting the Treasury Foreign Intelligence Network (TFIN).

This role supports both day-to-day network operations and ongoing modernization efforts in a highly secure environment.

Responsibilities

 * Build, configure, and maintain the day-to-day operation of the Treasury Foreign Intelligence Network (TFIN).
 * Manage and support Cisco network devices including routers, switches, enterprise firewalls, controllers, and wireless access points.
 * Configure, maintain, and troubleshoot firewall policies, access control lists (ACLs), and VPN connectivity in support of mission and security requirements.
 * Protect data, software, and hardware by implementing and maintaining DISA STIGs, NIST 800-53, and CNSS 1253 compliant security controls.
 * Troubleshoot, diagnose, and resolve complex hardware, software, and connectivity issues across LAN/WAN environments.
 * Support secure Video Teleconferencing (VTC) services, including network connectivity, firewall traversal, Quality of Service (QoS), and coordination with system and VTC support teams.
 * Support disaster recovery and continuity of operations planning and execution.
 * Monitor, analyze, and optimize network performance using tools such as SolarWinds and Wireshark.
 * Maintain network documentation including block diagrams, Simple Network Diagrams (SND), and Detailed Network Diagrams (DND).
 * Assist in the development of IATT and ATO packages and ensure ongoing accreditation compliance.
 * Research, test, and implement emerging network technologies to enhance performance and security.
 * Participate in customer briefings, design reviews, and after-action reports., * Active Top Secret clearance with SCI eligibility (final, favorable adjudication).