Senior Systems Engineer (onsite)

Date Posted: 2026-07-20 Country: United States of America Location: US-FL-ST PETERSBURG-381BD ~ 7401 22nd Ave N ~ BLDG D Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: 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​ Security Clearance Type: Secret - Current Security Clearance Status: Active and existing security clearance required on day 1 Raytheon Company, Managed by Collins Aerospace At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense. We are seeking an experienced Senior System Engineer to work onsite in St. Petersburg, FL. This position requires an active US Secret Security clearance.  The Senior Systems Engineer within the Systems Excellence Department contributes through all phases of the product development lifecycle (i.e. systems and software requirements, system architecture and design, software integration and test, simulation and test, integration and test, verification and sell-off), within an interdisciplinary process that ensures the customer and warfighters needs are satisfied through every stage. This commitment to excellence can sometimes include opportunities for travel, and flexible hours/shifts to ensure programmatic milestones are met.  Our team of talented engineers collaborates across disciplines from initial concepts to product sell off, integrates complex technology, debugs, and resolves interface issues, evaluates system performance, demonstrates, and sells off state-of-the-art products. We value different skills and experience, so don’t hold back. Your qualification could add tremendous value to our team. Our customers come from all different backgrounds, and so do our employees. If you’re passionate about what you could accomplish here, we’d love to hear from you.  Sign-on Bonus Eligible This position is located onsite in St. Petersburg, FL and requires an active US Secret security clearance. What You Will Do​:  You will join a team of talented engineers with the responsibility of defining the requirements, design, and architecture of subsystems that comprise the Cooperative Engagement Capability (CEC) product line, located in St. Petersburg, Florida, as part of Advanced Networking Solutions (ANS). The U.S. Navy’s CEC, a real-time ‘sensor-netting’ system that brings together radar data into a single integrated air picture from geographically dispersed ships, aircraft, and ground-based units. This integrated picture improves a battlegroup’s effectiveness by enabling longer range, cooperative, or layered engagements. Today’s CEC benefits from advancements in commercial and specialized technologies, as well as from the experience and expertise of the Collins Aerospace team, continually innovating to advance capability and performance.  Lead and support requirements development, system-level designs, and system-level models using Model-Based Systems Engineering (MBSE) principles.   Develop and manage testable requirements and associated verification approaches, ensuring traceability through the entire engineering lifecycle.   Perform system architecture development, subsystem design, and detailed component/system analysis to ensure alignment with customer needs and technical performance.   Execute integration and test activities in-house or at site locations, including hardware/software integration, troubleshooting, and operational testing.   Develop and execute robust verification and validation plans, including automated test execution and data analysis using tools like Python, MATLAB, and other scripting languages.   Apply systems and software modeling and simulation tools to support design trade-offs, performance analysis, and risk mitigation.   Utilize DOORS to manage the complete life cycle of requirements, including Engineering Change Proposals (ECPs), Change Notices (CNs), and traceability to tests and verification results.   Attend and contribute to internal and external Configuration Control Boards (CCBs) to ensure effective configuration management.   Collaborate with Program and Customer Leadership, as well as cross-functional teams, to define and achieve program objectives.   Drive innovative approaches to problem-solving, including the use of DevSecOps pipelines, Agile methodologies, and model-based approaches for design and test.  ​ Qualifications You Must Have:   Proven experience in the full system lifecycle, including requirements development, system design, integration, verification, and validation.   Hands-on experience in the operation, test, and troubleshooting of software on target hardware and/or complex military systems.   Experience with Agile development, including project estimating, reporting, and backlog management.   Proficiency in using requirements management tools, such as DOORS, for linking requirements to design, test, and verification artifacts.   Experience with MBSE tools such as Rhapsody, Cameo, or MagicDraw for system modeling and simulation.   Strong data analysis skills, including interpretation of results, identification of corrective actions, and monitoring of Key Performance