Sr Principal Systems Architect (Onsite

Date Posted:

Country:
United States of America

Location:

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

Position Role Type:
Hybrid

U.S. Citizenship required, as only U.S. citizens are authorized to access information under this program/contract.

Senior Principal Systems Architect at Applied Signal Technology (AST), a Collins Aerospace company. Responsible for leading cybersecurity mitigation strategy and system administration for high‑security U.S. defense missions.

• Lead, develop, document, and implement a robust cybersecurity mitigation strategy ensuring Linux IT resources are patched and hardened per 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 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.
• Use ticketing systems to resolve incidents submitted by end users.
• Travel up to 15%.

• U.S. citizenship required.
• Typically requires a STEM degree and a minimum of 10 years of relevant experience.
• Administration of RHEL 7/8/9, including systemd, firewalld, and SELinux.
• Administration of Net App enterprise storage.

• 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 Net App / OnTap tools.
• Experience with Enterprise Active Directory (AD) & LDAP.
• Experience with managed anti‑virus solutions (ClamAV & SEM).
• Shell scripting experience (Bash, Python, Ansible) and Kickstart.
• Experience hardening systems with SCAP and following STIGs.
• Experience supporting engineers in software, simulations, and hardware development.

• Medical, dental, and vision insurance.
• Three weeks of vacation for newly hired employees.
• Generous 401(k) plan with employer matching 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 such as pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal,  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.
• And more.

Salary range: 145,600 USD – 276,800 USD.

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 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.