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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Network Engineer - **Company:** ASGN Incorporated - **Location:** Chantilly, VA, United States - **Salary:** $197,600.0 - $228,800.0 - **Contract:** Permanent contract - **Skills:** Wireless LAN, Border Gateway Protocol, C++ (Programming Language), Data Link, Communications Protocols, Complex Networks, Computer Engineering, Network Congestion, Discrete Event Simulation, Ethernet, Multi-protocol Systems, OSI Models, Network Troubleshooting, Network Layer, Network Architecture, Network Planning and Design, Routing, Open Shortest Path First (OSPF), TCP/IP, Traffic Analysis, Wireshark, Wide Area Networks, Wireless Networks, Diagnostic Tools, Apex Code, Information Technology, Low Latency, Modeling and Simulation - **Published:** September 29, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9199138/network-engineer ## About the Role * Bachelor's or Master's degree in Computer Engineering, Electrical Engineering, Computer Science, or a related technical field. * Significant experience in network design, network architecture, and modeling/simulation environments. * Expert-level experience utilizing Riverbed Modeler, including Discrete Event Simulation (DES). * Strong understanding of OSI Layers 0-3 technologies. * Deep knowledge of Ethernet, TCP/IP, routing protocols such as BGP and OSPF, and WAN technologies including MPLS. * Experience designing, implementing, and testing complex WAN, LAN, and WLAN architectures. * Strong C or C++ programming skills for protocol modeling and simulation customization. * Experience tracing data packets, troubleshooting network performance issues, and analyzing network behavior. * Experience utilizing traffic analysis and troubleshooting tools such as Wireshark. * Strong analytical, communication, and documentation skills., * Experience with Riverbed SteelCentral AppResponse and/or NetPlanner. * Experience supporting RF modeling environments. * Experience with satellite communications simulations and Layer 0/1 technologies. * Background supporting defense, aerospace, or large-scale enterprise networking environments. * Experience developing technical reports and architecture recommendations for senior stakeholders. Location: Chantilly, VA Onsite expectation: Partial Remote / Hybrid Clearance Level: Ability to Obtain and Maintain an Active U.S. Secret Security Clearance Salary/Pay Range: $95.00 - $110.00/hour W2 PLEASE NOTE: Candidates must have the ability to obtain and maintain an active United States Secret-level security clearance as a condition and continuation of employment.* ## Description Apex Systems is currently hiring a Network Engineer (Riverbed Modeler SME) with a large federal client. As a Network Engineer, you will serve as a technical leader responsible for designing, modeling, simulating, and analyzing complex network architectures. You will leverage Riverbed Modeler to evaluate network performance, reliability, and scalability while supporting mission-critical network modernization and architecture efforts. Project Details / Mission Supported: * Create, execute, and analyze high-fidelity discrete-event simulations using Riverbed Modeler to evaluate network performance, reliability, and scalability. * Serve as a subject matter expert for routing, switching, transport, and network protocol analysis. * Design, model, and validate complex LAN, WAN, and wireless network architectures prior to deployment. * Modify existing simulation models and develop custom models using C/C++ to support proprietary and emerging protocol requirements. * Analyze OSI Layers 0-3, including physical, data link, and network layer technologies. * Evaluate network performance metrics including bandwidth utilization, packet loss, latency, and throughput. * Identify system bottlenecks and recommend improvements to network architecture and design. * Support architecture validation efforts through simulation and modeling activities. * Document simulation methodologies, test scenarios, results, findings, and technical recommendations. * Collaborate with engineering teams and stakeholders to develop optimized network solutions supporting mission requirements. ## Related Videos - [The Gashlycrumb Tinies of AI Networking You Must Know (or Languish!)](https://www.wearedevelopers.com/videos/2067-the-gashlycrumb-tinies-of-ai-networking-you-must-know-or-languish) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [Creating a routing app with Google Maps API from scratch](https://www.wearedevelopers.com/videos/831-creating-a-routing-app-with-google-maps-api-from-scratch) - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) - [Cyber Sleuth: Finding Hidden Connections in Cyber Data](https://www.wearedevelopers.com/videos/893-cyber-sleuth-finding-hidden-connections-in-cyber-data) ## Related Articles - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [How Much Does a Software Engineer Make? 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