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# Network Systems Engineer

- **Company:** Marathon TS Inc
- **Location:** Belleville, IL, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Border Gateway Protocol, Cisco IOS, Cisco Routers, Computer Networks, System Configuration, Linux, Virtual Private LAN Services, Networking Hardware, Internet Protocol, Multi-protocol Systems, JSON, Junos, Python (Programming Language), Language Modeling, Network Configuration and Change Management, Netconf, Routing, Open Shortest Path First (OSPF), Object-Oriented Software Development, Parsing, Software Engineering, Wide Area Networks, Extensible Markup Language (XML), Computer Networking Systems, Juniper, Git, Bitbucket, Restful APIs, Software Version Control, Cisco
- **Published:** November 5, 2026
- **Apply:** https://www.juju.com/job/16_61168a6e

## About the Role

* Currently possess an active DoD Secret clearance or higher
 * Currently possess DoD 8750 certification at IAT level II, Security CE or equivalent to meet requirement.
 * Python software development experience that includes REST api development, as well as the parsing, generation and validation of JSON.
 * Experience with distributed version control software such as Git and Bitbucket.
 * Experience developing software on a Linux platform.
 * Experience troubleshooting and configuring IP networks using at least one of the following routing methods: BGP, ISIS, OSPF, and/or Static routing.
 * Experience with either service provider or enterprise IP networks using an interface on Cisco (ESR and ASR) and/or Juniper routers.
 * Strong communication skills that enable proactive and effective collaboration with a team.
 * Knowledge of and ability to apply principles, theories, and concepts of Software Engineering., * Proficient in Juniper and Cisco configuration, troubleshooting, and design.
 * Experience with Cisco IOS XR, JUNOS, and Cisco IOS codes.
 * Network configuration experience, specifically with Juniper or Cisco routers, to include protocols such as BGP, MPLS, VPLS, Pseudowires and QoS.
 * Certifications with major network system vendors such as Cisco are a strong plus
 * Experience developing XML and/or object-oriented programming.
 * Experience developing software using SDN modeling languages and protocols such as YANG, NETCONF and RESTCONF.
 * Full software lifecycle experience (design, development, test, deployment), including deployment to a production environment.
 * Experience developing software including the ability to quickly learn new technologies.
 * Experience creating software design artifacts, including the creation of functional, technical, and architectural design documentation as well as test cases and installation, deployment and configuration documentation.
 * Software Defined Networking experience, particularly experience with Cisco NSO.
 * Possessing project, technical, interpersonal, presentation and problem management skills.

Required Education and Experience-

 * Bachelor's degree in a relevant technical discipline, plus 2-4 years of prior relevant experience or a Master's degree with less than 2 years of prior relevant experience.

## Description

* Design, develop, document, test and release software written in Python, XML, and other languages for use with the Cisco Network Services Orchestrator (NSO) platform.
 * Integrate software with network devices, including Cisco ASR9K and Juniper MX series routers.
 * Perform engineering tasks related to the design, implementation, and integration of network changes and sustainment of customer systems in a Wide Area Network environment.
 * Conduct planning and performance of analytical research, design development, and other tasks to align with customer specifications.
 * Ensure efficient delivery of contract capabilities using industry standards and repeatable processes.
 * Mitigate risks, control costs and schedule variance, and effectively manage large scale, integrated projects.
 * Perform a variety of analytical tasks which include hardware and software design and implementation.
 * Proactively identify, report, monitor, and mitigate technical risks.
 * Frequently communicate and collaborate with other team members to ensure successful completion of project objectives.