Sr Principal Systems Architect (Onsite

Applied Signal Technology (AST), part of Collins Aerospace, seeks a Senior Principal Systems Architect. The position is onsite at the San Jose site (relocation not provided). U.S. citizenship is required.

• 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 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%.

• U.S. citizenship required; only U.S. citizens may access the information under this program/contract.
• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and at least 10 years of prior 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 certification (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) and LDAP.
• Experience with managed anti‑virus solutions (ClamAV & SEM).
• Script experience (Bash, Python, Ansible) and Kickstart.
• Hardening systems using tools like 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 a separate retirement contribution, including a Lifetime Income Strategy option.
• Tuition reimbursement program.
• Student loan repayment program.
• Life insurance and disability coverage.
• Optional coverages: pet, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal,  protection.
• Birth, adoption, and parental leave benefits.
• Ovia Health, fertility, and family planning.
• Adoption Assistance and autism benefit.
• Employee Assistance Plan with up to 10 free counseling sessions.
• Healthy You Incentives, wellness rewards program.
• Doctor on Demand, virtual visits.
• Bright Horizons, child and elder care services.
• Teladoc Medical Experts, second opinion program.

Salary range: $145,600 – $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 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.