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Sr Network Engineer with Security Clearance

TEKsystems c/o Allegis GroupRichardson, TX🇺🇸United StatesPosted Sep 23, 2026

Quick Overview

Seniority
Mid Senior
Employment type
Temporary/Casual
Work mode
On Site
Location
Richardson, TX, United States
Posted
4 days ago
AnsiblePythonVMwareZero Trust

Job Description

Top Skills - Must Haves
CCNP
Network engineering Top Skills' Details
Cisco certified network professional: Will build/deploy all networking components for rank/stack services Secondary Skills - Nice to Haves
Router
CCNA
Cisco routers
Cisco switches
Data center
Switches Job Description
What You'll Do

  • Lead the design and deployment of all networking components associated with rack and stack infrastructure builds, including core, distribution, and access layer switching
  • Architect and implement routing solutions across complex, multi-site environments using OSPF, BGP, and EIGRP
  • Configure and manage Cisco switching infrastructure including VLANs, spanning tree, port channels, and QoS policies
  • Integrate network infrastructure with VMware NSX and virtualized environments in coordination with the infrastructure engineering team
  • Design and enforce network segmentation strategies to meet DISA STIG and RMF compliance requirements
  • Serve as the primary network subject matter expert, providing technical leadership and guidance to junior engineers and technicians
  • Support ATO processes by producing and maintaining network architecture documentation, data flow diagrams, and configuration baselines
  • Troubleshoot and resolve complex network issues across switching, routing, and security layers
  • Evaluate and recommend network technologies and solutions aligned with program requirements and government standards
  • Maintain accurate and current network documentation including topology diagrams, IP address management, and change records

What You Bring
-8–10+ years of hands-on experience in enterprise network engineering with demonstrated depth across routing, switching, and network security

  • Active Cisco Certified Network Professional (CCNP) certification required; CCIE a strong plus
  • Extensive experience with Cisco enterprise networking platforms including Catalyst, Nexus, and ASR product families
  • Strong working knowledge of routing protocols including OSPF, BGP, and EIGRP in complex multi-site environments
  • Experience designing and deploying network infrastructure as part of rack and stack build programs
  • Familiarity with network virtualization concepts and integration with VMware NSX environments
  • Working knowledge of DISA STIGs, NIST 800-53, and RMF as applied to network infrastructure
  • Active Top Secret security clearance required; TS/SCI eligibility strongly preferred

Preferred Qualifications

  • Prior experience supporting classified programs in a DoD, IC, or cleared defense contractor environment
  • Experience with network automation and scripting tools such as Ansible, Python, or Cisco DNA Center
  • Familiarity with SD-WAN, network access control (NAC), or zero trust network architecture concepts
  • Bachelor's degree in Computer Science, Information Technology, Network Engineering, or a related field; equivalent experience considered
  • DoD 8570/8140 IAT Level II or III certification (Security+, CASP+, CISSP, or equivalent)
Additional Skills & Qualifications
Preferred Qualifications
  • Prior experience supporting classified programs in a DoD, IC, or cleared defense contractor environment
  • Experience with network automation and scripting tools such as Ansible, Python, or Cisco DNA Center
  • Familiarity with SD-WAN, network access control (NAC), or zero trust network architecture concepts
  • Bachelor's degree in Computer Science, Information Technology, Network Engineering, or a related field; equivalent experience considered
  • DoD 8570/8140 IAT Level II or III certification (Security+, CASP+, CISSP, or equivalent) Work Environment
Onsite-- travel required between TX and IA Business Drivers/Customer Impact
Building out their Secure Dev Environment (SDE) Project Summary:
Our Buyer, a Fortune Aerospace & Defense organization, is implementing a Secure Development Environment (SDE) Infrastructure Deployment to support classified and controlled engineering workloads associated with Department of Defense (DoD) External Communities Job Description
We are seeking qualified professionals with *Top Secret Clearance and Sec+* to support a critical infrastructure deployment project for a large Aerospace & Defense company, one of the world's leading providers of aerospace and defense technologies. This engagement centers on the build-out and deployment of a Secure Development Environment (SDE), with work taking place across two key Collins Aerospace facilities in Richardson, TX and Cedar Rapids, IA.

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