Riverbed Modeler

Riverbed Modeler

Job ID: 2616438

Location: Washington, DC, United States

Date Posted: Sep 2, 2026

Category: Engineering and Sciences

Subcategory: Modeling/Sim Engr

Schedule: Full-Time

Shift: Day Job

Travel: Yes - 25% of the time

Minimum Clearance Required: Secret

Clearance Level Must Be Able to Obtain: TS/SCI

Potential for Remote Work: Hybrid

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Job Description

Description

We are seeking a Subject Matter Expert (SME) in Network Protocols and Simulation to join our Advanced Engineering Group. The successful candidate will act as the technical lead for designing, modeling, and analyzing high-fidelity network architectures. Using Riverbed Modeler (OPNET), you will simulate, troubleshoot, and optimize complex network scenarios, focusing on Physical (L1), Data Link (L2), and Network (L3) layers, including physical medium modeling (L0). This position is remote with travel.

Key Responsibilities

• Network Simulation (OPNET/Riverbed): Create, execute, and analyze high-fidelity discrete-event simulations in Riverbed Modeler to evaluate network performance, reliability, and scalability.
• Protocol Development & Analysis: Act as an SME in routing, switching, and transport protocols. Modify existing models or develop custom models using C/C++ to simulate proprietary or emerging protocols.
• OSI Layers 0-3 Focus: Deep dive into Physical Layer (signal propagation, modulation, BER), Data Link (MAC protocols, switching, VLANs), and Network Layer (BGP, OSPF, EIGRP, MPLS, IPv6) functionalities.
• Performance Optimization: Analyze simulation results to identify bottlenecks, packet loss, latency issues, and capacity constraints, proposing "what-if" scenarios to improve production network design.
• Architecture Modeling: Develop detailed network topologies, including LAN, WAN, and Wireless scenarios to validate architecture before hardware deployment.
• Technical Reporting: Document simulation methodologies, scenarios, and results in detailed technical reports for stakeholder review.

Qualifications

TYPICAL EDUCATION AND EXPERIENCE: Bachelors and fourteen (14) years or more of related experience; Masters and twelve (12) years or more experience ; PhD or JD and nine (9) years or more experience.

Required Skills and Qualifications:

• Experience with Riverbed/OPNET: Expert-level proficiency in Riverbed Modeler (OPNET), including Discrete Event Simulation (DES), simulation execution, and results analysis.
• Protocol Expertise (L1-L3): In-depth understanding of OSI Layer 0-3 technologies, including Ethernet, TCP/IP, routing protocols (BGP, OSPF), and WAN technologies (MPLS).
• Programming Skills: Strong programming skills in C or C++ for model customization, scripting, and protocol modeling.
• Network Design: Experience designing and testing complex WAN/LAN/WLAN network architecture.
• Analytical Skills: Strong analytical and debugging skills to trace data packets and analyze network behavior, familiar with traffic analysis tools like Wireshark.
• Education: Bachelor's or Master's degree in Computer Engineering, Electrical Engineering, or related field.

Preferred Qualifications

• Experience with Riverbed SteelCentral AppResponse or NetPlanner.
• Experience with radio frequency (RF) modeling or satellite communication simulations (Layer 0/1).
• U.S. citizenship, and an active DOD Secret clearance, with the ability to obtain a TS/SCI.

Target salary range: $120,001 - $160,000. The estimate displayed represents the typical salary range for this position based on experience and other factors.

Overview

SAIC accepts applications on an ongoing basis and there is no deadline.

SAIC is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.

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