Date 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 1
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 systems
- Support 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 requirements
- Design, deploy, configure, and harden Red Hat Enterprise Linux (RHEL) systems within secure architectures
- Develop and maintain Ansible automation artifacts for configuration management, provisioning, and system hardening
- Support Risk Management Framework (RMF) accreditation efforts including documentation, security control assessment, evidence generation, and mitigation plans
- Conduct security analyses, vulnerability assessments, and remediation planning across system components
- Conduct Site-Based Security Assessments (SBSA) at customer facilities as part of program support
- Evaluate 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 requirements
- Collaborate with cross-functional engineering teams to ensure secure design principles are applied throughout the lifecycle
- Work independently and be self-motivated to ensure the security posture of the system
- Troubleshoot complex security and system behavior across multi-domain, multi-level security environments
- Work 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 experience
- ACTIVE and transferable TOP SECRET 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 security clearances
- Experience in integration, testing, and requirements development
- Experience with Linux and Windows administration and hardening
- DoD 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 deliverables
Qualifications We Prefer:- Networking Experience
- Ability to document & understand physical and wiring of system/network
- Experience with Atlassian/Jira toolset for task management
- Experience with OpenShift/Kubernetes
- Cybersecurity accreditation experience
- Experience with Ansible
- Experience with NAS/SAN
- Experience with backup/recovery
- Experience using Agile methodologies
- Bachelor's degree in Engineering, Cybersecurity, Computer Science, or related field, or equivalent experience
- 5+ years of experience in system security engineering or secure system integration
- Expertise with Red Hat Enterprise Linux (RHEL) installation, configuration, hardening, and troubleshooting
- Hands-on experience with Ansible automation and infrastructure-as-code methods
- Experience working with Cross Domain Solutions (CDS) or similar multi-level security systems
- Experience with Security-Enhanced Linux (SELinux) policy configuration or troubleshooting
- Familiarity with Host-Based Security System (HBSS) or Endpoint Detection and Response (EDR) security tools
- Experience scripting with Bash, Python, or similar languages
- Understanding of virtualization and container platforms such as Virtual Machine Ware (VMware), Docker, or Podman
- Previous experience supporting DoD or Intelligence Community mission environments
- VMWare VCSA/vCenter/ESXi host administration, load balancing & optimization experience
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
- Tuition reimbursement program
- 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 illness insurance, group legal, ID theft protection
- Birth, adoption, parental leave benefits
- Carrot Health, fertility, and family planning
- Adoption Assistance
- Autism Benefit
- 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
- And more!
Learn More & Apply Now!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.
*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. 
