Sr. Systems Security Engineer (Onsite - Richardson, TX) TS/SCI clearance required

Job ID: 01885456Posted: Posted YesterdayStart Date: 2026-10-29Location: US-TX-RICHARDSON-C17 ~ 1717 Cityline Dr ~ CITYLINE C17Country: United States of AmericaTime Type: Full timeDate Posted:2026-10-29 Country:United States of America Location:US-TX-RICHARDSON-C17 ~ 1717 Cityline Dr ~ CITYLINE C17 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: TS/SCI - Current Security Clearance Status: Active and existing security clearance required on 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.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 a highly skilled Senior Systems Security Engineer to support programs involving Cross-Domain Solutions (CDS) and Site-Based Security Assessments (SBSA) that supports the submittal of DoD Risk Management Framework (RMF) artifacts for operational Authority to Operate (ATO), factory accreditation, and product deployment. The ideal candidate will have strong experience in secure system design, system hardening, automation, and compliance across Linux-based environments. This role requires deep technical expertise and the ability to support complex security architectures aligned with Department of Defense (DoD) and Intelligence Community (IC) security standards. This role will be worked onsite in Richardson, TX. Relocation assistance is available. Active and transferable U.S. government issued DoD TOP SECRET security clearance is required prior to start date.What You Will Do:Perform system administration and framework duties to ensure proper operation of the product at factory and assist as needed for deployed systemsSupport cybersecurity efforts (i.e., artifact development, implementation of security controls and requirements, mitigation tracking, and controls validation) necessary to lead to successful Authority to Operate (ATO) for system.Perform system security engineering for CDS and SBSA-based systems, ensuring adherence to DoD, National Institute of Standards and Technology (NIST), and Intelligence Community security requirementsDesign, deploy, configure, and harden Red Hat Enterprise Linux (RHEL) systems within secure architecturesDevelop and maintain Ansible automation artifacts for configuration management, provisioning, and system hardeningSupport Risk Management Framework (RMF) accreditation efforts including documentation, security control assessment, evidence generation, and mitigation plansConduct security analyses, vulnerability assessments, and remediation planning across system componentsConduct Site-Based Security Assessments (SBSA) at customer facilities as part of program supportEvaluate and monitor Commercial off the Shelf (COTS) and Government off the Shelf (GOTS) systems, applications, and services against our current architecture, RMF requirements, and application requirementsCollaborate with cross-functional engineering teams to ensure secure design principles are applied throughout the lifecycleWork independently and be self-motivated to ensure the security posture of the systemTroubleshoot complex security and system behavior across multi-domain, multi-level security environmentsWork in an enclosed classified environment, such as a Sensitive Compartmented Information Facility (SCIF)Travel up to 25%Qualifications You Must Have:Typically requires a University Degree and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experienceACTIVE and transferable TOP SECRET U.S. government issued security clearance is required prior to start dateU.S. citizenship is required, as only U.S. citizens are eligible for security clearancesExperience in integration, testing, and requirements developmentExperience with Linux and Windows administration and hardeningDoD 8140 certification in compliance with DoDM 8140.03M (e.g., CompTIA Security+)Experience with Risk Management Framework (RMF), Security Technical Implementation Guides (STIGs), and system accreditation deliverablesQualifications We Prefer:Networking ExperienceAbility to document & understand physical and wiring of system/networkExperience with Atlassian/Jira toolset for task managementExperience with OpenShift/KubernetesCybersecurity accreditation experienceExperience with AnsibleExperience with NAS/SANExperience with backup/recoveryExperience using Agile methodologiesBachelor’s degree in Engineering, Cybersecurity, Computer Science, or related field, or equivalent experience5+ years of experience in system security engineering or secure system integrationExpertise with Red Hat Enterprise Linux (RHEL) installation, configuration, hardening, and troubleshootingHands-on experience with Ansible automation and infrastructure-as-code methodsExperience working with Cross Domain Solutions (CDS) or similar multi-level security systemsExperience with Security-Enhanced Linux (SELinux) policy configuration or troubleshootingFamiliarity with Host-Based Security System (HBSS) or Endpoint Detection and Response (EDR) security toolsExperience scripting with Bash, Python, or similar languagesUnderstanding of virtualization and container platforms such as Virtual Machine Ware (VMware), Docker, or PodmanPrevious experience supporting DoD or Intelligence Community mission environmentsVMWare VCSA/vCenter/ESXi host administration, load balancing & optimization experienceWhat We Offer:Medical, dental, and vision insuranceThree weeks of vacation for newly hired employeesGenerous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy optionTuition reimbursement programStudent Loan Repayment ProgramLife insurance and disability coverageOptional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protectionBirth, adoption, parental leave benefitsCarrot Health, fertility, and family planningAdoption Assistance Autism BenefitEmployee Assistance Plan, including up to 10 free counseling sessionsHealthy You Incentives, wellness rewards programDoctor on Demand, virtual doctor visitsBright Horizons, child and elder care servicesTeladoc Medical Experts, second opinion programAnd more! Learn More & Apply Now!Collins Aerospace, an RTX company, is a leader in technologically advanced and intelligent solutions for the global aerospace and defense industry. Collins Aerospace has the capabilities, comprehensive portfolio, and expertise to solve customers’ toughest challenges and to meet the demands of a rapidly evolving global market. Collins Aerospace makes modern flight possible. Of course, that wouldn’t be possible without the capabilities and technologies of our organization, as well as our engineers – a highly skilled, accomplished network that spans more than 180 sites, 24 countries and 6 Strategic Business Units (SBUs). Our industry-leading experts are setting the standards for the aerospace industry and paving the way for the future. But as new challenges present themselves, we need fresh, creative and motivated minds to overcome these hurdles, help us break barriers and achieve new levels of innovation. Do you have what it takes to join a global organization that doesn’t shy away from big opportunities? If so, we invite you to join our ranks and create the next generation of aerospace technologies. Together, we will nurture an engineering culture that values intellectual curiosity, risk takers and integrity. A place where we will challenge ourselves, our teams, and the status quo and where we will work to find a way – the right way – to achieve what others can only dream of. *Please ensure the role type (defined below) is appropriate for your needs before applying to 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.As 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 95,500 USD - 181,700 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