Sr. Principal Systems Architect (ONSITE)

Job Description

Date Posted : 2025-09-17

Country :

United States of America

Location :

CA827 : 100 Headquarters Dr San Jose 100 Headquarters Drive , San Jose, CA, 95134 USA

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 : TS / SCI - Current

At Applied Signal Technology, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. Our team solves tough, meaningful problems that create a safer, more secure world.

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. 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.

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 :

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.

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.

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​

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 ​

Ovia 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  ​

Eligible for relocation

And More!

Learn More & Apply Now!​

Do you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions — whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today. ​

• 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.

The salary range for this role is 137,000 USD - 275,000 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.

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