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# Senior Network Engineer

- **Company:** Science Applications International Corporation
- **Location:** Arlington, VA, United States
- **Experience:** Expert
- **Salary:** $180,001.0 - $220,000.0
- **Contract:** Permanent contract
- **Skills:** Border Gateway Protocol, Big Data, Synchronous Optical Networking, Fiber Distributed Data Interface, Data Link, Wavelength-Division Multiplexing, Data Centers, DDoS Mitigation, Deep Packet Inspection, Linux, Ethernet, Internet Protocol, Internet Protocol Security (IP SEC), IPv4, IPv6, Virtual Private Networks (VPN), Multi-protocol Systems, Python (Programming Language), Network Layer, Network Architecture, Network Diagrams, Routing, Cisco Nexus Switches, Open Shortest Path First (OSPF), OpenStack, PCI Data Security Standards, Performance Tuning, Ansible, TCP/IP, Virtual Local Area Networks, Scripting, Computer Network Technologies, Juniper, SC Clearance, Information Technology, Routing & Switching, Terraform, Big Ip, Cisco, Vmware
- **Published:** October 26, 2026
- **Apply:** https://www.techcareers.com/job.asp?id=3466742083&tx=JL8983FFQ&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54

## About the Role

* Masters Degree in Network Engineering or related field + 8 years experience or Bachelors Degree in Network Engineering or related field + 10 years experience. 5+ years experience with provisioning 1/carrier class networks., * U.S. citizenship and an active Top-Secret clearance, with the ability to obtain a TS/SCI.
 * Experience: 5 -15+ years in network engineering, specifically within a service provider, ISP, or carrier-grade data center environment.
 * Technical Proficiency (L2-L3): TCP/IP, BGP, OSPF, ISIS, MPLS, IKE, IPSEC, VPNs, and VLANs.
 * Technical Proficiency (L0-L2): SONET/SDH,FDDI, OTN (ITU-T G.709, OTU4, OTU2).
 * Hardware Expertise: Hands-on experience with carrier-grade platforms (e.g., Ciena, Cisco ASR/NCS/Nexus, Juniper MX/Mist, Nokia, or Arista).
 * Automation/Scripting: Intermediate to advanced proficiency in Python or Ansible.
 * Linux/Unix: Strong Linux CLI skills.
 * Education: Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.
 * Certifications: CCNP/CCIE (Service Provider or Routing & Switching) preferred, but no required.

Preferred Qualifications

 * Experience with CGNAT platforms (e.g., F5 BIG-IP, A10 Networks).
 * Knowledge of 5G core networking or virtualized platforms (VMware, OpenStack).
 * Experience with Fiber transport technologies (DWDM, ROADM, WSS, PON).

## Description

SAIC is seeking a seasoned Network Engineer to join our Network Team. You will be responsible for the architecture, design, deployment, and optimization of our high-traffic, carrier-grade network infrastructure. The ideal candidate has deep, hands-on experience maintaining five-nines (99.999%) availability in a dedicated infrastructure (utilizing dark fiber, wavelength services), service provider, and/or large-scale data center. You will lead complex troubleshooting, ensure robust security, and drive network modernization, including advanced L0 optimization, IPv4/IPv6 transition and SDN (L0-L3) automation physical transport, data link, and network layers simultaneously. This position is remote with travel., * Architecture & Design: Design, implement, and maintain high-performance, scalable, and resilient IP network infrastructure (MPLS, IP/Ethernet).

 * Operations & Troubleshooting: Provide Tier 3/4 escalation support, conducting deep-packet inspection and root cause analysis (RCA) for complex outages.
 * Routing & Switching: Manage and optimize advanced routing protocols including BGP, OSPF, and ISIS, specifically focusing on traffic engineering and internet peering.
 * Carrier Grade Technologies: Implement and manage carrier-grade NAT (CGNAT) for IPv4/IPv6 transition, AAA/RADIUS infrastructure, and high-capacity wireless/mobility cores.
 * Performance Optimization: Maximize network performance through continuous monitoring and capacity planning to handle high-traffic volumes.
 * Automation: Develop and implement automation scripts using Python, Ansible, or Terraform to streamline configuration, provisioning, and MOP (Method of Procedure) execution.
 * Security & Compliance: Ensure compliance with security standards (e.g., ISO27001, PCI-DSS) and implement network-level security, such as DDoS protection and lawful intercept.
 * Documentation: Create and maintain detailed network diagrams, MOPs, and technical documentation.