Sr. Systems Security Engineer (Onsite - Sterling, VA)

2026-09-14

United States of America

US-VA-STERLING-291 ~ 22640 Davis Dr ~ DAVIS

Onsite

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 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 years of experience

• Active and transferable U.S. government issued Secret security clearance is required prior to start date

• RMF experience

• Linux or Windows experience

• Experience with Active Directory, VMware, Administration, SIEM Tools (Splunk or Kiwi), backup and recovery software, Trellix Endpoint Security and Tenable

• Department of Defense Directive (DoDD) 8140 / 8570 Certification requirements (CompTIA Security+ CE or equivalent certification and an Operating System Certification)

• Experience with NISPOM, JAFAN, JSIG, DFARS and/or DoD/RMF

• Experience with data storage, NAS, and SAN technologies and solutions

• Experience using VMWare vCenter, vSphere, and ESX and/or other virtual computing methods

• Experience supporting engineers in software, simulations, and hardware development

• Experience with Microsoft WSUS

• Exchange scripting experience

 

Secret - Current

Active and existing security clearance required on day 1

At 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.

Collins Aerospace is seeking a highly skilled Systems Security Engineer to strengthen and secure enterprise environments supporting Department of Defense (DoD) missions. The ideal candidate will bring deep expertise in Risk Management Framework (RMF) compliance, secure network architecture, operating system administration, and cybersecurity best practices. This role requires hands-on proficiency across Windows and Linux platforms, network infrastructure, and security control implementation, along with the ability to support accreditation activities and sustain mission‑critical systems. The selected candidate will play a pivotal role in designing, securing, and optimizing infrastructure to ensure operational resilience, regulatory compliance, and performance excellence within a high‑security environment.

 

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  Develop, implement, and maintain secure system architectures and technical solutions that meet all DoD RMF requirements, with a focus on risk reduction, automation, and control effectiveness

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  Engineer, deploy, and harden enterprise network and system solutions to ensure high security, resilience, scalability, and performance across legacy and emerging infrastructures

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  Configure, secure, and maintain Windows and Linux environments using industry best practices, approved security baselines, and automated configuration management tools

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  Create, manage, and secure Infrastructure as Code (IaC) artifacts—such as Ansible and VMWare templates—to enable repeatable, auditable, and secure system provisioning

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  Design and optimize Ansible automation workflows to enforce configuration compliance, patch management, and secure baseline deployment across multi‑platform systems

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  Support RMF accreditation activities in collaboration with the Government ISSM, including documentation development, control implementation, assessment coordination, and continuous monitoring

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  Install, configure, and troubleshoot enterprise firewalls, routers, and switches to maintain secure network segmentation, traffic integrity, and a robust defensive security posture

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  Conduct structured hardware and software testing, vulnerability analysis, and security validation to ensure secure, reliable system functionality and compliance with security standards

 

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