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# Principal Systems Security Cyber Engineer - Contingent (Onsite - Aurora, CO) TS/SCI required

- **Company:** RTX
- **Location:** Aurora, CO, United States
- **Experience:** Expert
- **Salary:** $107,500.0 - $204,500.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Antivirus Softwares, Systems Engineering, Unix, Cloud Computing, Cyber Security, Multi-Factor Authentication, Network Intrusion Detection Systems, Red Hat Enterprise Linux, Security Information and Event Management, Software Engineering, Software Requirements Analysis, Virtualization Technology, Wide Area Networks, Containerization, Kubernetes, Operating System Security, Cisco, Docker, Vulnerability Analysis
- **Published:** October 10, 2026
- **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-CO-AURORA-S76--16430-E-Hughes-Dr--BLDG-S76/Principal-Systems-Security-Cyber-Engineer---Contingent--Onsite---Aurora--CO--TS-SCI-required_01881405

## About the Role

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, * Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience

 * U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
 * Active and transferable TS/SCI U.S. government issued security clearance is required prior to start date
 * DoDM 8140.03 compliant certification (e.g., Security+, CISSP, or equivalent)
 * Experience analyzing operating system security features and vulnerabilities in compliance with Intelligence Community (IC) standards
 * Experience with embedded systems security (real-time embedded systems architecture)
 * Experience in systems engineering requirements and specifications, including implementing Federal and DoD Assessment and Authorization (A&A) processes, cyber security controls, and Risk Management Framework (RMF) documentation in accordance with NIST Special Publication (SP) 800-37, NIST SP 800-53, and DoD Instruction 8510.01
 * Experience in security systems engineering across hardware, software, and application solutions in both standalone and LAN/WAN configurations

Qualifications We Prefer:

 * Familiar with Program Protection Plans (PPP), DoDI 5000.02, and DoDI 5200.39
 * Experience working on U.S. Government contract proposals as a Cybersecurity Engineering subject matter experienced professional
 * Familiar with cloud and/or virtualization technologies
 * Familiar with Containerization (e.g., Docker/Kubernetes)
 * Familiar with Cross Domain Solutions (CDS)
 * Experience with IT, network, and system security administration, including security configuration and account management best practices for Windows, UNIX, Red Hat Enterprise Linux, and Cisco Systems
 * Experience utilizing information security toolsets, including anti-virus, vulnerability assessment, HIDS/NIDS, host-based and endpoint security, Multi-Factor Authentication (MFA), Security Information and Event Management (SIEM), and centralized auditing resources
 * Written and verbal communications skills, with the ability to work independently

## Description

* Implement security improvements by assessing current infrastructure, evaluating threat trends, and designing secure architecture, system requirements, plans, and policies
 * Advise, support junior engineers, and develop Risk Management Framework (RMF) documents and controls validation testing for Authorizations to Operate (ATOs)
 * Analyze cybersecurity data metrics and technical test results to identify vulnerabilities and track security performance
 * Conduct cybersecurity audits to evaluate security posture, verify proper tool implementation, and ensure regulatory compliance
 * Advise and work with the Software Engineering and/or System Engineering teams to implement cybersecurity policies, harden the system, and document findings
 * CONUS/OCONUS travel (up to 25%)

What You Will Learn:

 * You will enhance your leadership capabilities and systems security engineering expertise, gaining specialized skills that will differentiate you in the industry
 * You will gain valuable experience and career development opportunities as a Sr. Principal Systems Security Engineer, with a defined pathway toward Tech Fellow or Chief Security Engineer
 * You will develop deep technical expertise to become a cybersecurity subject matter expert (SME), while gaining valuable exposure to multiple business models and product lines in a dynamic, ever-evolving field. We are growing and so can you!