Sr Principal Systems Architect (Onsite)

Date Posted:

2026-03-03

Country:

United States of America

Location:

US-CA-SAN JOSE-827 ~ 100 Headquarters Dr ~ BLDG 827

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:

DoD Clearance: TS/SCI

Security Clearance Status:

Active and existing security clearance required on day 1

Applied Signal Technology managed by Collins Aerospace

Applied Signal Technology (AST) is seeking a Senior Principal Systems Architect who strives for excellence and has a passion to be part of a team that strengthens our nation and improves the security of our world.

https://www.rtx.com/collinsaerospace/what-we-do/industries/military-and-defense/communications/applied-signal-technology

AST provides trusted strategic and tactical SIGINT solutions that secure the interests of the U.S. and its partners. AST’s work in areas such as high-capacity broadband communications, signal processing and analysis, tactical SIGINT, and wireless communications continually challenges our extraordinary engineers to resolve problems and make the world a safer place. AST’s work environment is passionate, highly collaborative and provides employees the freedom to strengthen and expand their skills, explore new and creative ideas, and work closely with our nation’s finest service members all while embracing integrity, innovation, and work-life balance. 

This is an onsite position at our San Jose site. Relocation is provided. Top Secret SCI (TS/SCI) security clearance is required prior to start date.

What You Will Do: 

• Lead, develop, document, and implement a robust Cybersecurity mitigation strategy by ensuring Linux IT resources are patched and hardened in accordance with NIST-800-171 guidelines 
• Collaborate with Cyber teams to maintain and monitor system availability, performance, and logs using enterprise tools.  
• Leverage industry standards to build out automation workflows  
• Champion processes regarding hardware and software issues across physical and virtualized environments (VMWare)  
• Work closely with operations, supply chain and legal teams to support mission objectives.  
• Support audit readiness activities and respond to security vulnerability findings.  
• Provide mentorship and guidance to junior system administrators. 
• Leverage ticketing system to resolve incidents submitted by end users 
• Travel up to 15% 

Qualifications You Must Have: 

• Active and transferable U.S. government issued Top Secret SCI (TS/SCI) 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 a minimum of 10 years of prior relevant experience 
• Ability to demonstrate administration of RHEL 7/8/9, including systemd, firewalld, and SELinux.  
• Ability to demonstrate administration of Netapp enterprise storage.  

 Qualifications We Prefer: 

• Experience with enterprise logging, monitoring, and alerting systems.  
• Experience with automation tools such as Ansible.  
• Experience with CIS/STIG benchmarks and DoD security standards. 
• Linux OS Certificate (RHCSA / LPIC) 
• Experience with Splunk/Zabbix 
• Experience with High Performance Computing (HPC) Environments Experience with NetApp / OnTap tools 
• Experience with Enterprise Active Directory (AD) & LDAP 
• Experience dealing with Managed Anti-Virus (AV) solutions (ClamAV & SEM). 
• Scripting Experience (Bash, Python, Ansible) and Kickstart 
• Experience hardening systems using tools like SCAP and following STIGs. 
• Experience supporting engineers in software, simulations, and hardware development. 

 What We Offer :

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.

Do you want to be a part of something bigger? A team whose