Principal Linux Systems Administrator

Title: Principal Linux Systems Administrator

Company: Raytheon

Date Posted:

Location: NH201: 50 Bush Hill Road, Pelham, Test Facility, NH, Pelham, NH, 03076, USA

Position Role Type: Onsite

Citizenship/Clearance: U.S. citizenship required, active transferable US government issued secret clearance required prior to start date.

Security Clearance: Secret - Current

At Raytheon, 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. We bring the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. Our team solves tough, meaningful problems that create a safer, more secure world.

• Provide System Administration in a heterogeneous Redhat 8 & 9 Enterprise Linux environment.
• Utilize virtualization and containerization technologies, including VMware vCenter, vSphere, Horizon, ESXi, KVM, Podman, Docker, and Kubernetes/Open Shift.
• Collaborate with engineers, software developers, systems administrators, storage, networking, and high-performance computing teams to resolve complex infrastructure and integration challenges.
• Partner with cybersecurity teams to ensure continuous compliance with regulatory and security frameworks such as DFARS, RMF, and the NIST Cybersecurity Framework.
• Provide critical, on-site support for mission systems in a closed DoD area, responding to both planned and emergent tasks, with occasional work outside standard hours and up to 10% travel as required.
• Obtain and maintain DoD 8140 / 8570 certification (e.g., CompTIA Security+ or equivalent) within six months of hire.
• This position is 100% onsite.

• Typically requires a bachelor’s degree and a minimum of 5 years of prior relevant experience or a master’s degree and minimum of 3 years of prior relevant experience.
• Must have active and transferable U.S. government issued secret clearance prior to start date; U.S. citizenship is required.
• Experience with Red Hat Enterprise Linux (RHEL), including system installation, administration, patching, and troubleshooting in enterprise environments.
• Experience with secure system configurations, system hardening, application settings, and tailoring Linux environments.

• Strong leadership, teamwork, communication (written and oral), collaboration, and organizational skills.
• Deep experience with Red Hat Enterprise Linux (RHEL) and its ecosystem, including authentication and identity services (SSSD, LDAP, Kerberos, NIS) and file sharing/integration services (Samba, NFS).
• Expertise with automation and configuration management tools such as Ansible and Red Hat Satellite, along with strong scripting skills in Bash, Python, Perl, or C to support provisioning, patching, and lifecycle management.
• Familiarity with enterprise storage systems (e.g., Net App) and virtual desktop infrastructure (VDI) technologies such as Horizon, Profile Unity, and NVIDIA GPU virtualization (NLS, DLS).
• Proficiency with monitoring, vulnerability scanning, and compliance assessment tools (ACAS, Splunk, Nessus, SCAP, STIG, Nagios, Solar Winds) and working knowledge of security frameworks (CMMC, NISPOM, JAFAN, JSIG, DFARS, DoD RMF).

Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value:
Trust, Respect, Accountability, Collaboration, and Innovation. Relocation assistance is available.

Salary range: 82,000 USD - 164,000 USD. Benefits include 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. Additional incentive compensation may be available.

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.

Mid-Senior level

Full-time

Information Technology

Defense and Space Manufacturing