Senior Systems Engineer (onsite)

Saint Petersburg, Florida, United States Jul 20, 2026 $86,800 - $165,200/year 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: 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 Indicators (KPIs) or Technical Performance Measures (TPMs). Typically requires a Bachelor's degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 5 years of relevant experience, or an Advanced Degree in a related field with a minimum of 3 years of experience. Active and transferable U.S. government issued Secret security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Qualifications We Prefer: Experience in the operation, integration, and troubleshooting of naval systems or other complex defense systems. Demonstrated ability to develop and execute integration, verification, and validation planning documentation, including test plans, procedures, and reports. Proficiency in programming (e.g., C/C++, Python) and familiarity with Linux operating systems, DevSecOps pipelines, and Test-Driven Development (TDD) or Behavior-Driven Development (BDD) methodologies. Experience with automated test scripting and automated data analysis to streamline verification and validation processes. What We Offer: Medical, dental, and vision insurance Three weeks of vacation for newly hired employees Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option Student Loan Repayment Program Life insurance and disability coverage Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance,critical illnessinsurance, group legal, ID theft protection Birth, adoption, parental leave benefits Ovia Health, fertility, and family planning Adoption Assistance Employee Assistance Plan, including up to 10 free counseling sessions Healthy You Incentives, wellness rewards program Doctor on Demand, virtual doctor visits Bright Horizons, child and elder care services Teladoc Medical Experts, second opinion program Relocation assistance may be provided And more! Mission Systems: Do you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions - whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today. * Please consider the following role type definitions as you apply for this role. Onsite : Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products. At Collins, the paths we pave together lead to limitless possibility. And the bonds we form – with our customers and with each other – propel us all higher, again and again. The salary range for this role is 86,800 USD - 165,200 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills. Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement. Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and or the company’s performance. This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply. RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window. RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. Privacy Policy and Terms: Click on this link to read the Policy and Terms RTX combines Collins Aerospace, Pratt & Whitney, and Raytheon to deliver innovative solutions in aerospace and defense, addressing complex challenges with cutting‑edge technology. Aviation and Aerospace Component Manufacturing Transportation Equipment Manufacturing Manufacturing Company size 10,001+ employees Company type Public company Total funding $200K Grant Momentum Team growth 3% in 12 mo 144,215 employees on LinkedIn Feb 22 May 26 Employee experience What it’s like inside 3.6 8,451 reviews 72% would recommend Culture & values Culture & values 3.4 Work-life balance Work-life balance 4.0 Career opportunities Career opportunities 3.7 Compensation & benefits 3.6 Capital Funding history Footprint Where they work Arlington, VA, US #J-18808-Ljbffr RTX