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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Systems Engineer (Onsite) - **Company:** RTX - **Location:** Aurora, CO, United States - **Experience:** Expert - **Salary:** $86,800.0 - $165,200.0 - **Contract:** Permanent contract - **Skills:** Systems Engineering, Baselining, Configuration Management, System Configuration, Monitoring of Systems, Radio-Frequency Identification, Systems Integration - **Published:** September 30, 2026 - **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-CO-BUCKLEY-SFB-CUST--18500-E-6th-Ave--BUCKLEY-SFB-External-Site/Senior-Systems-Engineer--Onsite-_01878705-1 ## About the Role * Typically requires a Bachelor's degree in Science, Technology, Engineering, or Mathematics (STEM preferred) and a minimum of 5 years of prior engineering experience or equivalent experience. * Experience in performing maintenance, operations, or field service in complex technical environments (e.g., RF systems, satellite communications, large mechanical systems, industrial equipment, or similar). * Experience with system integration, verification, validation, and supportability analysis. * An active and transferable TS/SCI CI Poly U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, only U.S. citizens are eligible for the required security clearance. ## Description Raytheon is seeking a Senior Systems Engineer where you will play a vital role in designing, maintaining, and ensuring the operational readiness of complex systems critical to national security. This onsite position supports a 24/7 mission environment, requiring technical expertise, adaptability, and commitment to excellence. Location: Aurora, CO (Buckley) What You Will Do * Lead and execute preventive, predictive, and corrective maintenance activities for mission-critical systems and infrastructure, applying systems engineering principles to sustain availability, reliability, and operational readiness. * Analyze system performance, identify degradation trends, and lead troubleshooting and root-cause analysis of complex hardware, software, and system-level anomalies. * Develop and implement technical solutions and corrective actions to restore system capability, improve reliability, and reduce recurrence of equipment and system failures. * Provide technical leadership during system anomalies, mission-impacting events, and environmental disruptions, coordinating troubleshooting efforts and supporting timely restoration of operational capability. * Maintain system configuration integrity through engineering documentation, change control, baseline verification, and validation of hardware and software configurations. * Evaluate system changes, maintenance activities, and operational impacts to ensure continued compliance with technical requirements, established procedures, and mission objectives. * Develop, review, and improve maintenance procedures, technical documentation, troubleshooting processes, and engineering workflows based on operational experience and system performance data. * Serve as a technical resource and mentor for engineering and maintenance personnel, providing guidance on troubleshooting, system operation, maintenance practices, and technical decision-making. * Collaborate with systems engineering, operations, maintenance, program leadership, customers, and other stakeholders to resolve technical issues and ensure system readiness throughout the operational lifecycle. * Support integration, verification, validation, testing, and implementation of system modifications, upgrades, and engineering changes within an operational environment. * Perform hands-on engineering and maintenance activities as required, including work on antenna systems, elevated structures, and mission equipment in indoor and outdoor environments. * Support 24/7 mission operations through rotating shifts, anomaly response, emergency support, and on-call assignments while providing senior-level technical expertise during critical events., * Experience performing preventive, predictive, and corrective maintenance on national security mission system critical infrastructure. * Experience monitoring system performance and responding to equipment anomalies, failures, and environmental impacts. * Experience with maintaining configuration control and documenting equipment changes. * Support rotating 12-hour shifts, including days, nights, weekends, and holidays * Experience safely ascending and working at heights using ladders and elevated work platforms. * Experience handling equipment weighing up to 50 pounds and performing physically intensive tasks in various environments. ## Related Videos - [Robots are coming into the wild! 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