> Markdown version of [/jobs/ext/4561713-senior-systems-engineer-network-architecture-infrastructure-protection-onsite](https://www.wearedevelopers.com/jobs/ext/4561713-senior-systems-engineer-network-architecture-infrastructure-protection-onsite). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Systems Engineer, Network Architecture & Infrastructure Protection (Onsite) - **Company:** RTX - **Location:** Richardson, TX, United States - **Experience:** Expert - **Salary:** $95,500.0 - $181,700.0 - **Contract:** Permanent contract - **Skills:** Agile Methodology, Amazon Web Services, Systems Engineering, JIRA, Microsoft Azure, Cloud Computing, Information Systems, Linux, Network Configuration and Change Management, Network Architecture, Routing, Network Segmentation, Oracle (Applications), Scrum Methodology, Rhapsody, Subsystems, Systems Modeling Language, Systems Architecture, TCP/IP, Virtual Local Area Networks, Google Cloud, MagicDraw, Firewalls (Computer Science), Storage Technologies, Vmware - **Published:** November 4, 2026 - **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-TX-RICHARDSON-C17--1717-Cityline-Dr--CITYLINE-C17/Senior-Systems-Engineer--Network-Architecture---Infrastructure-Protection--Onsite-_01886833 ## About the Role Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance, * Utilize effective communication skills with all levels of management, program team members, and external stakeholders., * Advanced aerospace and defense solutions supporting mission-critical military platforms. * Application of Model-Based Systems Engineering (MBSE) principles to emerging technologies and complex system architectures. * Hands-on experience with next-generation network, compute, storage, and cloud-based technologies. * Leadership and operational excellence through Collins Aerospace's Customer Oriented Results and Excellence (CORE) Operating System. Qualifications YOU Must Have: * Understanding of network architectures, TCP/IP protocols, routing, switching, and VLANs. * Familiarity with network segmentation, access control mechanisms, firewalls, and infrastructure protection techniques. * Proven experience in systems engineering to include capturing customer requirements, operations concept development, deriving and tracing system and sub-system requirements. * Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) unless prohibited by local laws/regulations and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience. * Active and transferable U.S. government DoD issued Top-Secret security clearance prior to start date. * U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance., * Experience with Model-Based Systems Engineering (MBSE), including development of SysML models such as activity, state, block diagrams, and use cases using tools like MagicDraw Cameo, Rhapsody, or Enterprise Architect. * Experience with Linux Operating System. * Familiarity with National Institute of Standards and Technology (NIST) standards, Risk Management Framework (RMF) processes, and Defense Information Systems Agency Security Technical Implementation Guides (DISA STIGs). * Agile experience working as a scrum master, Product Owner (PO), Release Train Engineer (RTE), or other agile leadership roles. * Experience with processes such as peer review, configuration, and change management. * Participating in root cause analysis and corrective actions. * Identify, assess, and manage technical risks and opportunities to support program execution, system performance, and successful delivery of mission objectives. ## Description As a Senior Systems Engineer within Strategic Defense Solutions (SDS), you will apply your technical expertise to the development of advanced Strategic Nuclear Deterrence capabilities, contributing to the design, integration, and validation of secure, resilient mission systems. In this role, you will collaborate across geographically distributed teams to support systems and cybersecurity engineering efforts for next-generation network, compute, and storage technologies-from early-stage development through accreditation and production. This position offers the opportunity to expand your leadership and technical capabilities while working alongside experienced professionals in communications and nuclear deterrence. We are seeking motivated engineers who thrive in solving complex problems, driving technical execution, and collaborating across disciplines to deliver innovative solutions for critical missions. This position is located onsite in Richardson, TX and requires an active Top Secret clearance. What YOU Will Do: * Develop, analyze and maintain system level requirements related to network infrastructure connectivity and system protection. * Evaluate network and system architectures against established technical standards to identify vulnerabilities, dependencies, and potential operational risks. * Support network hardening and system integrity through the implementation of access controls, traffic filtering and secure communication mechanisms. * Analyze network configuration, protocols, system access mechanisms to identify weaknesses and recommend improvements. * Building complicated models using SysML for activity, state, block diagrams, and use cases. * Develop and verify test procedures at the system and sub-system levels. * Utilize VMWare or other cloud platforms (AWS, GCP, Azure, Oracle) in cloud and hybrid environments. * Utilize JIRA to decompose features into user stories with clear acceptance criteria.