Senior Platform Software Engineer - Linux (Onsite)

Job ID: 01875656Posted: Posted 3 Days AgoStart Date: 2026-09-16Location: US-TX-MCKINNEY-513WC ~ 2501 W University Dr ~ WING C BLDGCountry: United States of AmericaTime Type: Full timeDate Posted:2026-09-16 Country:United States of America Location:US-TX-MCKINNEY-513WC ~ 2501 W University Dr ~ WING C BLDG Position Role Type:Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements:The ability to obtain and maintain a U.S. government issued security clearance is required.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Security Clearance Type: DoD Clearance: Secret Security Clearance Status: Active and existing security clearance required after day 1At 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. Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.The Advanced Product and Solutions organization at RTX provides the joint warfighter with actionable information from an unblinking eye across the battlespace. By joining the APS Engineering team you’ll have the opportunity to design, develop and test product capabilities for Active Electronically Scanned Array (AESA) radars, integrated sensor suites, precision targeting, multispectral EO/IR targeting systems, Pilot Situational Awareness, Special mission aircraft and Strategic and tactical ISR Systems.But more than anything, we are innovators, creators and strategists drawing inspiration from each other every day. We collaborate, iterate, and execute with an eye toward the company mission and personal career growth.We have an exciting opportunity for a Senior Platform Software Engineer to join our Advanced EO/IR Systems (AES) team in McKinney, TX, which is part of our Advanced Products & Solutions group.What You Will DoTroubleshoot, maintain, and implement solutions to optimize infrastructure operations for the AES Product Family.Analyze and identify requirements for new or existing computer, server, peripheral, network, and telecommunications systems, considering specialized technology needs.Design, implement, code, test, document, and support systems integration for mission‑critical advanced surveillance and targeting system solutions.Collaborate closely with cybersecurity teams to ensure all security controls are met.Work alongside software engineers, systems engineers, and implementation teams to ensure performance and deployment compliance.This job is onsite in McKinney, TX; local residency or relocation required.The ability to obtain and maintain a U.S. government issued Secret security clearance is required.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.​Qualifications You Must HaveTypically requires a degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 5 years of prior relevant engineering experience. An advanced degree in a related field may be substituted for an additional 2 years of experience.CompTIA Security+ certification requiredExperience with Red Hat Enterprise Linux (7.x/8.x) including:Software and hardware installation and maintenanceSystem administration tasks such as patching, RPM packaging, performance tuning, networking, LDAP user management, and securitySecuring and hardening RHEL systems per STIG requirementsScripting with Bash and PythonLinux virtualization (KVM), Linux networking (creating virtual NICs, implementing forwarding rules, bridging interfaces), and general networking capabilitiesExperience with developer tools including Git, Artifactory, Bitbucket, Jira, and CI/CD tools (Jenkins or GitLab).Experience implementing Infrastructure as Code (IaC) and containerized environments using Ansible, Kickstart, Terraform, Chef, Docker, Podman, and Kubernetes to standardize and automate platform provisioning and deployments.Qualifications We Prefer Active and transferable U.S. government issued Secret security clearance.Excellent hardware and software troubleshooting skillsLinux Security, Hardening, and Enterprise ManagementRed Hat Certified System Administrator (RHCSA)Red Hat Satellite administrationLUKS implementationVM and container hardening and vulnerability analysisPerformance tuning and monitoringRMF (Risk Management Framework) knowledgeNetworkingConfigure Layer 2 Cisco switches with simple VLANs, setting static routesConfigure switches as PTP boundary clocksPTP sync issues, ptp4lConfigure grandmaster clocks (e.g., Safran/Orolia SecureSync)Enterprise Infrastructure and Identity ServicesNAS and SAN administrationDNS, sendmail, LDAP administrationAD, SAML, OAuth, OpenID, and other strong authentication technologiesCloud and DevSecOps EcosystemsFamiliarity with AWS and AzureExperience with Platform One DevSecOps platform toolchains and capabilitiesExperience with at least one major programming language (Groovy, C++, C#, Python, Java) and troubleshooting on a Linux systemExcellent interpersonal and communication skillsDemonstrated experience learning new technologies, methodologies and processes quicklyProven ability to work effectively with remote colleagues and customersExperience administering Windows based systemsWhat We OfferOur values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.Relocation Offered Based On EligibilityLearn More & Apply Now!Please consider the following role type definition 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.Clearance Information: This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process.More information about Security Clearances can be found on the US Department of State government website here: Location Information: This position is onsite at our campus in beautiful McKinney, TX.Welcome to Raytheon in McKinney, TX - YouTubeWe Are RTXAs part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.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